Changing replicator to use openstack.common.log

This change moves glance/cmd/replicator to use common logging.
Changes logging.<level>() to be unified with rest as LOG.<level>().
Also fixes some translations.

Related to bp refactoring-glance-logging

Change-Id: Iff4ecf9ab95174b9be9861fe0d8fd40162eadb8a
Merge "Changing replicator to use openstack.common.log"