SGF-370 - Add multi-Index definition and creation support.

Added integration tests to test the definition and subsequent creation of multiple Indexes inside a GemFire Server within a Spring context.

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

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+	   xmlns:gfe="http://www.springframework.org/schema/gemfire"
+	   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/gemfire http://www.springframework.org/schema/gemfire/spring-gemfire.xsd
+		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd
+">
+
+	<util:properties id="gemfireProperties">
+		<prop key="name">CreateDefinedIndexesIntegrationTest</prop>
+		<prop key="mcast-port">0</prop>
+		<prop key="log-level">warning</prop>
+	</util:properties>
+
+	<bean class="org.springframework.data.gemfire.config.CreateDefinedIndexesIntegrationTest$IndexBeanPostProcessor"/>
+
+	<gfe:cache properties-ref="gemfireProperties"/>
+
+	<gfe:partitioned-region id="People" persistent="false" key-constraint="java.lang.Long"
+		value-constraint="org.springframework.data.gemfire.config.CreateDefinedIndexesIntegrationTest$Person"/>
+
+	<gfe:index id="IdIdx" define="true" expression="id" from="/People" type="KEY"/>
+
+	<gfe:index id="BirthDateIdx" define="true" expression="birthDate" from="/People" type="HASH"/>
+
+	<gfe:index id="FullNameIdx" define="true"  expression="fullName" from="/People" type="FUNCTIONAL"/>
+
+	<gfe:index id="LastNameIdx" expression="lastName" from="/People" type="HASH"/>
+
+</beans>