Update gerrit change attributes even if merged

Function updateChange short-cuts dependency checking for merged changes, but
some attributes that need to be updated were after the short-cut return.
This resulted in zuul saying status is MERGED, but then not matching
Changeish filter for status MERGED.

Closes-Bug: 1356662
Change-Id: I954b2716a5af75a959d4129ba88d7dae0750d2a5
Merge "Update gerrit change attributes even if merged"