Merge "add engine parameter for offline migrations"

diff --cc neutron/db/migration/cli.py
index 6f997777a7aa320b02988e79083c5b3aaad2b144,6a5da8baeb15c06a23030e8c85e9cacf7c88c821..83f620b0a8e630e2a77a1ae7c1a6e2e7c315c0df
--- 1/neutron/db/migration/cli.py
--- 2/neutron/db/migration/cli.py
+++ b/neutron/db/migration/cli.py
@@@ -45,8 -45,10 +45,11 @@@ _db_opts = 
      cfg.StrOpt('connection',
                 deprecated_name='sql_connection',
                 default='',
 +               secret=True,
                 help=_('URL to database')),
+     cfg.StrOpt('engine',
+                default='',
+                help=_('Database engine')),
  ]
  
  CONF = cfg.ConfigOpts()