
Remove override forcing Java 1.6, update SDK to 1.7.5


Revision created by MOE tool push_codebase.
MOE_MIGRATION=6280


git-svn-id: 3f46d6ac2040cd462fa3667a3400c83a82e084d9@21 d537cd30-a800-f30c-cc8c-eaa9e1c31ce9

Khan/appengine-gcs-client,Khan/appengine-gcs-client,Khan/appengine-gcs-client