INT-4082: Fix MongoDB MessageStore for auditing

JIRA: https://jira.spring.io/browse/INT-4082

Starting with Spring Data 1.9 the `MappingContextIsNewStrategyFactory` relies on a newly introduced `PersistentEntities` and doesn't register entities lazily any more.
Such a change finishes with the `Unsupported entity` exception when an auditing is switched on (`<mongo:auditing/>`)
for the `MongoDbMessageStore` and `AbstractConfigurableMongoDbMessageStore` internally created `MongoTemplate` and `MessageWrapper` and `MessageDocument` SI internal entities.

* Don't register `ApplicationContext` into internally created `MongoTemplate`s since to avoid entity events emitting for `MessageWrapper` and `MessageDocument`
* Pull `MongoDbMessageBytesConverter` to the top-level class to let customize `MappingMongoConverter` properly if there is need to audit `MessageDocument` anyway,
what can be possible via external injections into `AbstractConfigurableMongoDbMessageStore` implementation
* Fix `mongodb.adoc` for some typos

**Cherry-pick to 4.2.x**

spring-integration-mongodb/src/test/java/org/springframework/integration/mongodb/store/ConfigurableMongoDbMessageStore-CustomConverter.xml

@@ -12,6 +12,8 @@
 
 	<mongo:db-factory dbname="test"/>
 
+	<mongo:auditing/>
+
 	<beans:bean id="abstractMessageStore" class="org.springframework.integration.mongodb.store.MongoDbChannelMessageStore"
 				abstract="true">
 		<beans:constructor-arg name="mongoDbFactory" ref="mongoDbFactory"/>

spring-integration-mongodb/src/test/java/org/springframework/integration/mongodb/store/DelayerHandlerRescheduleIntegrationConfigurableTests-context.xml

@@ -2,8 +2,12 @@
 <beans:beans xmlns:beans="http://www.springframework.org/schema/beans"
 			 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 			 xmlns="http://www.springframework.org/schema/integration"
+			 xmlns:mongo="http://www.springframework.org/schema/data/mongo"
 			 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-	http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd">
+	http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
+	http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo.xsd">
+
+	<mongo:auditing/>
 
     <beans:bean id="mongoConnectionFactory" class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
         <beans:constructor-arg>

spring-integration-mongodb/src/test/java/org/springframework/integration/mongodb/store/DelayerHandlerRescheduleIntegrationTests-context.xml

@@ -2,8 +2,12 @@
 <beans:beans xmlns:beans="http://www.springframework.org/schema/beans"
 			 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 			 xmlns="http://www.springframework.org/schema/integration"
+			 xmlns:mongo="http://www.springframework.org/schema/data/mongo"
 			 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-	http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd">
+	http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
+	http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo.xsd">
+
+	<mongo:auditing/>
 
     <beans:bean id="mongoConnectionFactory" class="org.springframework.data.mongodb.core.SimpleMongoDbFactory">
         <beans:constructor-arg>

spring-integration-mongodb/src/test/java/org/springframework/integration/mongodb/store/mongo-aggregator-config.xml

@@ -1,13 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:int="http://www.springframework.org/schema/integration"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd">
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xmlns:int="http://www.springframework.org/schema/integration"
+	   xmlns:mongo="http://www.springframework.org/schema/data/mongo"
+	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
+		http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo.xsd">
 
 	<int:aggregator input-channel="inputChannel" output-channel="outputChannel" message-store="mongoStore"
 					release-strategy-expression="size() == 10"/>
 
+	<mongo:auditing/>
+
 	<int:channel id="outputChannel">
 		<int:queue/>
 	</int:channel>

spring-integration-mongodb/src/test/java/org/springframework/integration/mongodb/store/mongo-aggregator-configurable-config.xml

@@ -1,13 +1,17 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xmlns:int="http://www.springframework.org/schema/integration"
-	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-		http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd">
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xmlns:int="http://www.springframework.org/schema/integration"
+	   xmlns:mongo="http://www.springframework.org/schema/data/mongo"
+	   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration.xsd
+		http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo.xsd">
 
 	<int:aggregator input-channel="inputChannel" output-channel="outputChannel" message-store="mongoStore"
 					release-strategy-expression="size() == 10"/>
 
+	<mongo:auditing/>
+
 	<int:channel id="outputChannel">
 		<int:queue/>
 	</int:channel>