Enable horizon domain logins
Enable horizon domain logins

The horizon default is to prevent multidomain login. While allowing
multidomain login wont prevent default domain login. Overhead is we
must type in domain to login even if its default domain.

Change-Id: I965c3612eb584e88071c619037e1f42b3f4c7cd0
Closes-Bug: #1560683
(cherry picked from commit 1ef3dd1de022d736358c9d902d290d69e0d45286)

negronjl/kolla,negronjl/kolla,negronjl/kolla