With keystone's move to /identity, a conflict in for resources was
created as both keystone and horizon used /identity. The keystone
config took precedence and rendered API output in the horizon UI.
This patch sets the root for horizon to /dashboard and serves all
horizon content from there. Additionally, a RedirectMatch has been added
to the apache config for horizon to redirect '/' to '/dashboard' this
will allow the implementation to change without being immediately
painful to users.
Also made the path '/dashboard/' configurable in stackrc.
Closes-Bug: #1478306
Depends-On: I9a04f936ed6d8c14775a332dc28e903992806c42
for devstack-gate changes to remove hard coded horizon url structure
assumptions.
Change-Id: I6fbca5cea9e44df160afbccc71bd045437657320
7b105c572e