Add oslo_log command options to magnum-db-manage
Add oslo_log command options to magnum-db-manage

As we all know, 'command magnum-api' and 'magnum-conductor' have
many options such as 'log-file' and 'use-syslog'. But as for
magnum-db-magnum, these are not available.
Add oslo_log command options will help.

Change-Id: If61efbde56e1d7dd0ed88d76fa42dd00501cc938

ArchiFleKs/magnum,ArchiFleKs/magnum,openstack/magnum,openstack/magnum