CI: Remove failing ceph-related test

This test has no purpose now.
Kolla Ansible removed Ceph deployment support in Ussuri so it
failed CI.

This also drops py27 gating because it broke in Ussuri.

Change-Id: I09aac88e2552231b0c76c5bea112e692571151c4

.zuul.yaml

@@ -40,16 +40,13 @@
     templates:
       - openstack-cover-jobs
       - openstack-lower-constraints-jobs
-      - openstack-python-jobs
       - openstack-python3-ussuri-jobs
       - publish-openstack-docs-pti
     check:
       jobs:
         - kollacli-tox-mypy
-        - kollacli-tox-functional-py27
         - kollacli-tox-functional-py36
     gate:
       jobs:
         - kollacli-tox-mypy
-        - kollacli-tox-functional-py27
         - kollacli-tox-functional-py36

kolla_cli/tests/functional/test_service.py

@@ -197,18 +197,6 @@ class TestFunctional(KollaCliTest):
                          'Group: %s, still listed in services: %s'
                          % (test_group, msg))
 
-    def test_ceph(self):
-        # ceph has an odd structure in the upstream all-in-one file.
-        # It was changed in 3.0.1 of kolla. This test is to check that
-        # the kolla change was not overwritten by a kolla update from upstream.
-        # If the upstream file is used, ceph will default to having no
-        # groups.
-        inventory = Inventory.load()
-        ceph = inventory.get_service('ceph')
-        groups = ceph.get_groupnames()
-        self.assertIsNot(groups, 'ceph has no groups, could be due to '
-                         'using an unpatched upstream all-in-one file.')
-
 
 if __name__ == '__main__':
     unittest.main()