Cody Herriges 64f5872e5f Making root_url configurable
This commit will make universal modifications to the way the "root_url"
  parameter is set so that a person can modify it.  Adjusts tests
  accordingly and improves on beaker success scenario.

  This needs to occur to allow people the ability to serve horizon from the
  root of a vhost.

Change-Id: If43ea694b2601c55a4b07c1cd5fc411abbaaaa2d
2016-02-25 17:20:31 -08:00
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