Split out jenkins module

Part of an effort to split most of puppet modules out of system-config:
http://specs.openstack.org/openstack-infra/infra-specs/specs/puppet-modules.html

Depends-On: https://review.openstack.org/#/c/131302/

Change-Id: I1f6588c46a53d83249de68be6c2b36ddb3c805cb
Merge "Split out jenkins module"