[#1221] use new function to determine if files can be added or not
[#1221] use new function to determine if files can be added or not

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