Remove reference to Travis CI

* Remove reference to Travis CI
* Add note about supported OpenStack versions

Fixes: bug #1165069
Change-Id: I30d45ed96b82a8ab7429fa132a09a03722b94661
Require the HTTP config file on all OS.

This is required on newer versions of puppet
otherwise it will automatically remove it.

Change-Id: I1f64ca0d2df497b0da565340b31ce091472ffe76
Fix rspec tests to support latest apache module

Latest apache module requires new dependencies: concat and firewall.

It now requires those facts:
* operatingsystemrelease
* concat_basedir (required by concat)

Change-Id: Ic561ec756c844c3b3cbe0c441a3d9a0d8c1abe9b
Merge "Require the HTTP config file on all OS."
Merge branch 'dev' of https://github.com/gwdg/puppetlabs-horizon into dev