dashboard: use puppet-horizon from upstream

- Update fixtures and Puppet file
- Update cloud::dashboard

Close bug #367
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
cloud::dashboard: fix lint issues

Bug #367
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Merge pull request #383 from enovance/horizon-upstream

dashboard: use puppet-horizon from upstream