CSWC-182: handle listmetadataformats arg checking, changed verbs to return lists of elements (!44) · Merge requests · NSF NOIRLab / Community Science and Data Center / VO Services / templates / VO Registry

Ugh, didn't realize that there can be multiple errors, so passing lists of elements from verbs now.

CSWC-182: handle listmetadataformats arg checking, changed verbs to return lists of elements