LP#778989: Attempt to find "Correct" copy location

LP#778989: Attempt to find "Correct" copy location

This adds a trigger to asset.copy that on insert or change of the location
and/or call number tries to find an identically named copy location that
is scoped to the owning library of the copy.

If it does not find one it uses the location provided.

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>
Signed-off-by: Chris Sharp <csharp@georgialibraries.org>
Signed-off-by: Ben Shum <bshum@biblio.org>