Bring back Java 1.7 source target config changes that got reverted with my branch commits.

git-svn-id: https://hyracks.googlecode.com/svn/branches/fullstack_asterix_stabilization@3038 123451ca-8445-de46-9d55-352943316053
diff --git a/pregelix/pregelix-core/pom.xml b/pregelix/pregelix-core/pom.xml
index 57ae85e..5238068 100644
--- a/pregelix/pregelix-core/pom.xml
+++ b/pregelix/pregelix-core/pom.xml
@@ -65,8 +65,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>2.0.2</version>
 				<configuration>
-					<source>1.6</source>
-					<target>1.6</target>
+					<source>1.7</source>
+					<target>1.7</target>
 					<fork>true</fork>
 				</configuration>
 			</plugin>