improved test to avoided subman unregistered failure and string comparison failue
acceptance testing suite changes
Merge pull request #341 from fsharath/fsharath

Fsharath
added test coverage for Bug 994344 - Display appropriate message when
used unsupported files in rct cat-manifest/dump-manifest command
RCTCatManifestWithNonZipFile_Test()
RCTDumpManifestWithNonZipFile_Test()