Add trigger to set legacy moduleid and version. Addresses Connexions/cnx-publishing#17
Fix bad test data where moduleid prefixes for collections are 'col' not 'c'.
Split legacy default assign trigger.
Test contemporary publications do not invoke republications.
Merge pull request #217 from Connexions/legacy-pub-triggers-3

Legacy compatibly triggers - MANUAL-UPGRADE  defaults for moduleid and version on modules table: triggers