Add puppet-lint to Gemfile
Add puppet-lint to Gemfile

Change-Id: I256918c7fc083ca621f75ccb73ad76fd4005063d

TelekomCloud/puppet-cinder,aquto/puppet-cinder,bodepd/puppet-cinder,blkperl/puppet-cinder,gwdg/puppet-cinder,danehans/puppet-cinder,varunarya10/puppet-cinder,mattymo/puppet-cinder,mjeanson/puppet-cinder,umago/puppet-cinder,jeffrey4l/puppet-cinder