Updated openstack/openstack
Project: openstack/oslo.db  44bd28704c25529520ee054e5c222b85ba587302

Add DBDuplicateEntry detection for mysqlconnector driver

Actually, adjust the mysql regex to match on the "Duplicate entry 'foo'
for key 'bar'" error string that is presumably buried deep within mysqld
itself, with less regard to specific punctuation.
Hopefully this will be portable between all mysql drivers.

Change-Id: I241c5cb61a6335857942bf79ee2301ae0c94ff6e