Updated openstack/openstack
Project: openstack/trove  a31640024d10ebd754b39192ac3a3656f86a8b1d

Logging audit for trove/guestagent/backup module

Adjust logging to conform to logging standards.
Cleaned up some messages that were unclear. Also
corrected the usage of the word Backup which was
inconsistently capitalized in some messages.

Also addressed a pattern of exception handlers using
LOG.error merely to log the exception (instead of
using LOG.exception)

Change-Id: Id2eb57d3395273f9aebd41de0146f7a2fc2774c8
Partial-Bug: #1324206