Clean all warnings for puppet-lint gate

Change-Id: If143d40464af60bcba4b69705ef48c1206fead02
(cherry picked from commit 3d3c342bb386fec99863456ceee1e1a8a197591d)
Remove non-implemented glance::scrubber

It can be added back once implemented.

Change-Id: I2de5d9b0b2117baf145d7b99de9684452bcb8e7d
(cherry picked from commit 7672c8b8fa9836f151cbc386140054cb2fbf54be)
Fail puppet-lint on warnings

Puppet-lint will now fail if there is any warnings.

Change-Id: I17bb6fa59af1c69d94f65616d41717c0297a8ad1
(cherry picked from commit c96750897c113ed19104e46883c276b22789bdc7)