VIVO-421 fixes bug with class drop downs
Merge branch 'maint-rel-1.6' of https://github.com/vivo-project/Vitro into maint-rel-1.6
quieting some migration log messages
VIVO-389 pellet exception
removed a debugging log statement
VIVO-448 ORNG was unable to parse our LOD response.

The date-time stamp on the document itself was not in the correct format.
VIVO-448 Change the "example_gadgets" file to use gadgets that are currently active.
Merge branch 'maint-rel-1.6' into develop