[HUBZERO][#7291][COM_OAIPMH] Escape content and added a little better record existence checking
[HUBZERO][#7291][COM_OAIPMH] Escape content and added a little better record existence checking

zooley/hubzero-cms,anthonyfuentes/hubzero-cms,zweidner/hubzero-cms,anthonyfuentes/hubzero-cms,zweidner/hubzero-cms,zweidner/hubzero-cms,zooley/hubzero-cms,anthonyfuentes/hubzero-cms,anthonyfuentes/hubzero-cms,zooley/hubzero-cms,zweidner/hubzero-cms,zooley/hubzero-cms