[#303] fix bug related to the required metadata elements SWATmodelParameters
[#303] fix bug related to the required metadata elements SWATmodelParameters

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