Remove import of unnecessary modules from Horizon
Remove import of unnecessary modules from Horizon

Manila UI tests import modules with test data for lots of projects.
It is unnecessary and should be removed.
One of such unnecessary modules was removed from Horizon and unit tests
are broken because of it. So, remove breaking one and all other unused.

Change-Id: Ic121ac52d261b1f4eb972a0075cd3a09883fb100
Closes-Bug: #1524735

openstack/manila-ui,openstack/manila-ui,openstack/manila-ui