PLFM-1815 Refactor DoiObjectType and ObjectType.
PLFM-1815 Refactor DoiObjectType and ObjectType.
PLFM-1509 Query should not accept createdby as a query parameter.
Merge pull request #668 from eric-wu/develop

PLFM-1509 Query should not accept createdby as a query parameter.
Merge pull request #667 from eric-wu/quickfix

PLFM-1815 Refactor DoiObjectType and ObjectType.