add delete_resource_from_index method which is related to issue 851
add delete_resource_from_index method which is related to issue 851

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