operations-puppet-* made concurrents

operations-puppet-doc is not made concurrent, it is used to publish the
documentation on doc.wikimedia.org. So keep that job serialized.

Jobs updated:

operations-puppet-pep8
operations-puppet-spec
operations-puppet-test
operations-puppet-typos
operations-puppet-validate

Change-Id: Ie83535075afbd49b2a90fb0080fa2a997f2e3128