Run ironic-pep8 job even on doc changes
Run ironic-pep8 job even on doc changes

We are planning on adding a 'doc8' check to the pep8 check. So we need
to make sure that the pep8 job gets run for doc changes too.

Change-Id: I7953e5ef98919dbc32944763d6324483c0586395

noorul/os-project-config,dongwenjuan/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,Tesora/tesora-project-config,openstack-infra/project-config,noorul/os-project-config,openstack-infra/project-config