Sync latest cfg and log from oslo-incubator

Main cfg change is:

  c5984ba Move logging config options into the log module

Logging changes include:

  c5984ba Move logging config options into the log module
  751c35b Verbose should not enable debug level logging
  edcdd25 Improve millisecond logging
  9e5912f Fix pep8 E125 errors.
  edf14e0 Enable millisecond logging by default
  9b81289 Allow nova and others to override some logging defaults
  90ada0e update deprecated stanza
  efba202 Adjust the logging_context_format_string.
  c8cf6f7 move nova.common.deprecated to openstack-common

Fixes bug #989269

Use new LOG.deprecated() in place of cinder.common.deprecated.warn().

Also pull this cinder/context.py change from nova:

  ce098cc Add user/tenant shim to RequestContext

to avoid issues caused by a s/user_id/user/ change in the context
logging format.

Change-Id: I3913ea54465658d93dc56e014dfe5d911b0541d6
Merge "Sync latest cfg and log from oslo-incubator"