[NANOHUB][#266584][COM_COLLECTIONS] Check if created_by has been set before setting it. Avoids accidental overwriting issues.
[NANOHUB][#266584][COM_COLLECTIONS] Check if created_by has been set before setting it. Avoids accidental overwriting issues.

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