Merge pull request #51 from sspeiche/master

Change testETagHeadersGet() to pending
Renamed testPostResource in NonRDFSourceTests due to conflict
Obsolete test method in testPutBadETag

It says `NOT_IMPLEMENTED`when it really is.
Merge pull request #52 from fserena/hotfix-samename

Same name for two tests
Merge pull request #53 from fserena/patch-1

Obsolete test method in testPutBadETag