Update running-tests.rst file
Update running-tests.rst file

There is no test_kolla_docker.py in kolla/tests directory

Change-Id: I57885c308726c65300e9067efa08ffb8bd7ebb52
partially-implements: blueprint documentation-rework

mrangana/kolla,nihilifer/kolla,mrangana/kolla,intel-onp/kolla,coolsvap/kolla,intel-onp/kolla,nihilifer/kolla,GalenMa/kolla,stackforge/kolla,openstack/kolla,stackforge/kolla,GalenMa/kolla,rahulunair/kolla,coolsvap/kolla,rahulunair/kolla,stackforge/kolla,coolsvap/kolla,openstack/kolla