PLFM-1648: save entity + file handle + annotations with Submission
Removed File Handle ID from Submission
Add serialized EntityBundle to Submission
Require eTag for Submissions. Need to add integration test.
WIP: need to fetch Bundle at service level
etag verification on Submission
Require ownership or admin rights to get Submissions
public-access getAllSubmissionStatuses() methods
Merge pull request #369 from bkng/develop

PLFM-1648: save EntityBundle with Submission objects
PLFM-1648: Refactor EntityBundle serialization to SubmissionManager
Merge pull request #371 from bkng/develop

PLFM-1648: Refactor EntityBundle serialization to SubmissionManager
Change DOI target URL to synapse.org