Detect no params w/ manual version_id counter and set to itself

Detect no params w/ manual version_id counter and set to itself

Fixed bug where programmatic version_id counter in conjunction with
joined table inheritance would fail if the version_id counter
were not actually incremented and no other values on the base table
were modified, as the UPDATE would have an empty SET clause.  Since
programmatic version_id where version counter is not incremented
is a documented use case, this specific condition is now detected
and the UPDATE now sets the version_id value to itself, so that
concurrency checks still take place.

Change-Id: I80e385bffeed4851cc20131cbe983c173a46f655
Fixes: #3996