SGF-408 - Provide support in the SDG XML namespace to load a pre-defined data set using GemFire Snapshot Service for development and testing purposes.

Refactored the SnapshotServiceFactoryBean with the addition of a new property (suppressInitImport) to suppress importing on initialization.
Refactored the SnapshotServiceFactoryBean SnapshotServiceAdapter interface's doImport(..) and doExport(..) method signatures to varargs.
Added the ComposableSnapshotFilter class implemeting the SnapshotFilter interface and Composition Design Pattern for composing multiple SnapshotFilters into one using logical operators.
Cleaned up and added addition unit tests.
Completed all integration testing including testing with export and import snapshot application event driven GemFire Cache Region snapshots.

src/test/resources/org/springframework/data/gemfire/SnapshotApplicationEventTriggeredImportsExportsIntegrationTest-context.xml

@@ -0,0 +1,70 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	   xmlns:c="http://www.springframework.org/schema/c"
+	   xmlns:context="http://www.springframework.org/schema/context"
+	   xmlns:gfe="http://www.springframework.org/schema/gemfire"
+	   xmlns:gfe-data="http://www.springframework.org/schema/data/gemfire"
+	   xmlns:task="http://www.springframework.org/schema/task"
+	   xmlns:util="http://www.springframework.org/schema/util"
+	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	   xsi:schemaLocation="
+		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
+        http://www.springframework.org/schema/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
+        http://www.springframework.org/schema/data/gemfire http://www.springframework.org/schema/data/gemfire/spring-data-gemfire.xsd
+        http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task.xsd
+        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
+">
+
+	<util:properties id="gemfireProperties">
+		<prop key="name">SnapshotApplicationEventTriggeredImportsExportsIntegrationTest</prop>
+		<prop key="mcast-port">0</prop>
+		<prop key="log-level">warning</prop>
+	</util:properties>
+
+	<gfe:cache properties-ref="gemfireProperties"/>
+
+	<gfe:partitioned-region id="Doe" persistent="false"/>
+	<gfe:partitioned-region id="EveryoneElse" persistent="false"/>
+	<gfe:partitioned-region id="Handy" persistent="false"/>
+	<gfe:partitioned-region id="People" persistent="false"/>
+
+	<bean id="nonHandyNonDoeSnapshotFilter" class="org.springframework.data.gemfire.ComposableSnapshotFilter" factory-method="and">
+		<constructor-arg index="0">
+			<list>
+				<bean class="org.springframework.data.gemfire.SnapshotApplicationEventTriggeredImportsExportsIntegrationTest.NotLastNameSnapshotFilter" c:lastName="Doe"/>
+				<bean class="org.springframework.data.gemfire.SnapshotApplicationEventTriggeredImportsExportsIntegrationTest.NotLastNameSnapshotFilter" c:lastName="Handy"/>
+			</list>
+		</constructor-arg>
+	</bean>
+
+	<context:annotation-config/>
+
+	<bean class="org.springframework.data.gemfire.SnapshotApplicationEventTriggeredImportsExportsIntegrationTest.SnapshotImportsMonitor"/>
+
+	<task:scheduler id="snapshotImportsMonitorScheduler" pool-size="1"/>
+
+	<task:annotation-driven scheduler="snapshotImportsMonitorScheduler"/>
+
+	<gfe-data:snapshot-service id="peopleSnapshotService" region-ref="People">
+		<gfe-data:export-snapshot location="gemfire/snapshots/people.snapshot"/>
+		<gfe-data:export-snapshot location="gemfire/snapshots/nonHandyNonDoePeople.snapshot" filter-ref="nonHandyNonDoeSnapshotFilter"/>
+	</gfe-data:snapshot-service>
+
+	<gfe-data:snapshot-service id="doeSnapshotService" region-ref="Doe" suppress-init-import="true">
+		<gfe-data:import-snapshot location="gemfire/snapshots/people.snapshot">
+			<bean class="org.springframework.data.gemfire.SnapshotApplicationEventTriggeredImportsExportsIntegrationTest.LastNameSnapshotFilter" c:lastName="Doe"/>
+		</gfe-data:import-snapshot>
+	</gfe-data:snapshot-service>
+
+	<gfe-data:snapshot-service id="everyoneElseSnapshotService" region-ref="EveryoneElse" suppress-init-import="true">
+		<gfe-data:import-snapshot location="gemfire/snapshots/nonHandyNonDoePeople.snapshot"/>
+	</gfe-data:snapshot-service>
+
+	<gfe-data:snapshot-service id="handySnapshotService" region-ref="Handy" suppress-init-import="true">
+		<gfe-data:import-snapshot location="gemfire/snapshots/people.snapshot">
+			<bean class="org.springframework.data.gemfire.SnapshotApplicationEventTriggeredImportsExportsIntegrationTest.LastNameSnapshotFilter" c:lastName="Handy"/>
+		</gfe-data:import-snapshot>
+	</gfe-data:snapshot-service>
+
+</beans>