SWE-22 / SP-656: fix for "duplicate source compliance setting specification" error

SVN: 31087

gradle/javaproject.gradle

@@ -132,7 +132,7 @@ compileJava {
         options.forkOptions.with {
             executable = 'java'
             jvmArgs = ['-cp', configurations.ecj.asPath, 'org.eclipse.jdt.internal.compiler.batch.Main', 
-                       '-nowarn', '-source', '1.6' ]
+                       '-nowarn']
         }
     }
 }
@@ -144,7 +144,7 @@ compileTestJava {
         options.forkOptions.with {
             executable = 'java'
             jvmArgs = ['-cp', configurations.ecj.asPath, 'org.eclipse.jdt.internal.compiler.batch.Main', 
-                       '-nowarn', '-source', '1.6' ]
+                       '-nowarn']
         }
     }
 }