Split puppetlint to lenient and strict jobs

The lenient job only reports puppet-lint errors.  Will let us make it
voting faster.
The strict job reports warnings as well.

Creates:
  operations-puppet-puppetlint-lenient
  operations-puppet-puppetlint-strict

Change-Id: Ie8c8adc360be46752076d844d6dea770e502aa9f