Enhance wsgi to listen on ipv6 address

Check if the hostname is ipv6 and set the family appropriately.
Add tests to ensure that IPv6 and IPv6 with SSL works properly.

Change-Id: Ibcf0a9387691d124888c0c0540d4322b0a3b3d67
Fix i18n of string templates.

Change-Id: I4ed11b43b8b1072094bd2b6f88687900c858bafe
Sync base identity Driver defs with SQL driver

Change-Id: Id20c1167dbc718ba4bd8cb0df88edd2bc922c3c6
Merge "Fix i18n of string templates."
Merge "Sync base identity Driver defs with SQL driver"