fixed bugs. SEQWARE-1559. All parents of a sample mysteriously disappear because they were being cleared. SEQWARE-1577 AttributeAnnotator cascades deletes when annotating. fixed in all PUT methods. calling 'clear()' on the existing sample attributes was cascading the delete
Merge branch 'hotfix/0.13.6.5' of github.com:SeqWare/seqware into hotfix/0.13.6.5