DATACMNS-535 - Build now requires Java 7 to run.

Added Maven Enforcer Plugin to make sure the build is run against a JDK 7.

Related ticket: DATACMNS-532.

pom.xml

@@ -204,6 +204,28 @@
 					</execution>
 				</executions>
 			</plugin>
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-enforcer-plugin</artifactId>
+				<version>1.3.1</version>
+				<executions>
+					<execution>
+						<id>enforce-rules</id>
+						<goals>
+							<goal>enforce</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<rules>
+						<requireJavaVersion>
+							<version>[1.7,1.9)</version>
+						</requireJavaVersion>
+					</rules>
+				</configuration>
+			</plugin>
+
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-assembly-plugin</artifactId>
@@ -212,6 +234,7 @@
 				<groupId>org.codehaus.mojo</groupId>
 				<artifactId>wagon-maven-plugin</artifactId>
 			</plugin>
+
 		</plugins>
 	</build>