Revert the Java compiler configuration to 1.6

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1592392 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/ipojo/manipulator/manipulator/pom.xml b/ipojo/manipulator/manipulator/pom.xml
index 12cd751..b0bea2e 100644
--- a/ipojo/manipulator/manipulator/pom.xml
+++ b/ipojo/manipulator/manipulator/pom.xml
@@ -123,8 +123,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.8</source>
-          <target>1.8</target>
+          <source>1.6</source>
+          <target>1.6</target>
         </configuration>
       </plugin>