Add Rakefile to run rspec tests over all the puppet modules.

Signed-off-by: Gael Chamoulaud <gchamoul@redhat.com>
Automatic update

This module update commit was generated by Bade.
For more info please check https://github.com/paramite/bade

This commit is setting modules to following state:
keystone
 - old commit: 38518cbcb3ef8ad3bb068730a21d790b27a29b74
 - new commit: a0e8e9a393aef8b61c0452a7d917d5af22c5271d
Automatic update

This module update commit was generated by Bade.
For more info please check https://github.com/paramite/bade

This commit is setting modules to following state:
swift
 - old commit: 2193831dd787e9b24382c588dfa49917bcf47262
 - new commit: 54fdb8474245deebc7f4a04cd74caf061a4e90f2
Merge branch 'swift-update'
Merge branch 'TestsInfrastructure'