DATACASS-126 - Added maven-compiler-plugin to parent pom to enforce 1.6

compatability.

pom.xml

@@ -230,6 +230,17 @@
 
 	<build>
 		<plugins>
+			<plugin>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<version>3.1</version>
+				<configuration>
+					<source>1.6</source>
+					<target>1.6</target>
+					<optimize>true</optimize>
+					<showDeprecation>true</showDeprecation>
+					<showWarnings>true</showWarnings>
+				</configuration>
+			</plugin>
 			<plugin>
 				<groupId>org.bitstrings.maven.plugins</groupId>
 				<artifactId>dependencypath-maven-plugin</artifactId>