[#83476332] Show identity zone name on the login page.
https://github.com/cloudfoundry/uaa/commit/4803959799319e396ae7af279ee6a15fb3103820
MultitenantJdbcClientDetailsService (and test) is a direct copy-paste
from JdbcClientDetailsService in spring security oauth. The next commits
will show what changes. [#83476446]
https://www.pivotaltracker.com/story/show/83476446
IdentityZoneified add and retrieve queries around oauth_client_details

[#83476446]
https://www.pivotaltracker.com/story/show/83476446
Fixed configuration after login-server merge. 

[#83476446]
https://www.pivotaltracker.com/story/show/83476446
Setting the token issuer to the correct subdoamin

[#83476446]
https://www.pivotaltracker.com/story/show/83476446
Adding not null constraint to oauth_client_details.identity_zone_id