Add irrelevant files to neutron-centos-7-tripleo-standalone
Add irrelevant files to neutron-centos-7-tripleo-standalone

This job runs nearly three hours, let's add the same irreleant-files
list as to all other tempest tests so that this does not run for doc
changes and translation imports.

Change-Id: I26a8c677f04ae8cffdeb0983cde072111693d0dc

openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron,openstack/neutron,mahak/neutron