Updated openstack/openstack
Project: openstack/neutron  eab2a21f6257807fe4c4bb36e7e346e6e737646b

Make log level in linux.utils.execute configurable

Function linux.utils.execute always logs failures on error level.
Some callers use this function to check resource existance and
interpret failure as normal flow. Log level is made configurable
for such cases.

Change-Id: I8e4cd7b42234426f8fe58d353a64e898f02f8998
Closes-bug: 1339045