added default constructor
Merge pull request #342 from dburdick/develop

added default constructor
PLFM-1775: Improve error message for Submissions without Entity version no.
PLFM-1770: ForbiddenException (403) for Submission from a Synapse user not registered as a Participant
PLFM-1774: insert evalId in pagination URLs
Merge pull request #343 from bkng/develop

Evaluation services improvements (PLFM-1770, 1774, 1775)
Add EZID configuration
New doi package. EzidMetadata
Add EZID client
Add testing invalid doi
Add retry with exponential backoff
Add mocked test for retry
Merge pull request #347 from eric-wu/develop

Add a retryable HTTP client over EZID's REST APIs
PLFM-1787
Merge branch 'PLFM-1787' into develop
Merge pull request #348 from brucehoff/develop

PLFM-1787