[#1572] add extracted creators and contributors if not already exist
[#1572] add extracted creators and contributors if not already exist

ResearchSoftwareInstitute/MyHPOM,hydroshare/hydroshare,hydroshare/hydroshare,ResearchSoftwareInstitute/MyHPOM,ResearchSoftwareInstitute/MyHPOM,RENCI/xDCIShare,ResearchSoftwareInstitute/MyHPOM,RENCI/xDCIShare,RENCI/xDCIShare,RENCI/xDCIShare,RENCI/xDCIShare,ResearchSoftwareInstitute/MyHPOM,hydroshare/hydroshare,hydroshare/hydroshare,hydroshare/hydroshare