Don't run tempest/devstack jobs on nova/test.py only changes

We already skip running the devstack/tempest integration jobs
for changes which only touch nova/tests/* but not the nova/test.py
module itself, so this adds that filter.

Change-Id: I8984e5b68ccb7d327b7ce16c50f19e46e769699a

Author: mriedem

.zuul.yaml

@@ -20,6 +20,7 @@
       - ^nova/hacking/.*$
       - ^nova/locale/.*$
       - ^nova/tests/.*$
+      - ^nova/test.py$
       - ^releasenotes/.*$
       - ^setup.cfg$
       - ^tests-py3.txt$
@@ -116,6 +117,7 @@
       - ^nova/hacking/.*$
       - ^nova/locale/.*$
       - ^nova/tests/(?!live_migration/).*$
+      - ^nova/test.py$
       - ^releasenotes/.*$
       - ^setup.cfg$
       - ^tests-py3.txt$
@@ -143,6 +145,7 @@
       - ^nova/hacking/.*$
       - ^nova/locale/.*$
       - ^nova/tests/.*$
+      - ^nova/test.py$
       - ^releasenotes/.*$
       - ^setup.cfg$
       - ^tests-py3.txt$