Force output of "crm configure show" to not use colors

We don't care about colors, we just want to parse plain text.

This allows us to avoid being hit by this crmsh bug:
https://bugzilla.novell.com/show_bug.cgi?id=893011
Adapt rubygem-ruby-shadow to the new name schema

Use the new schema for rubygem in SLE12 and openSUSE 13.2.
Merge pull request #151 from aplanas/master

Adapt rubygem-ruby-shadow to the new name schema
Merge pull request #140 from vuntz/plain-output

Force output of "crm configure show" to not use colors
Fix mocked platform version to make travis pass again
Merge pull request #154 from rhafer/travis

Fix mocked platform version to make travis pass again
Add some apply_role magic for cluster roles that nodes might be missing