puppet: don't run functional tests when touching spec/ files
puppet: don't run functional tests when touching spec/ files

spec/* files are for unit and beaker tests. We don't need to waste
integration and tripleo jobs if a patch only tries to modify the spec/*
files.

Change-Id: I92c0672ddffd85a305ea884f6c8e131dddd3aecd

openstack-infra/project-config,openstack-infra/project-config