Replace logging with oslo_log.
Replace logging with oslo_log.

The oslo.log (logging) configuration library provides standardized
configuration for all openstack projects. It also provides custom
formatters, handlers and support for context specific logging (like
resource id's etc).

Change-Id: I1f1adb198c34da711cd7e8e370d39a9e3cea6f50

openstack/keystone,rajalokan/keystone,openstack/keystone,mahak/keystone,mahak/keystone,rajalokan/keystone,mahak/keystone,ilay09/keystone,openstack/keystone,rajalokan/keystone,ilay09/keystone,ilay09/keystone