Switch tripleo based job to be run on Centos 8

Change-Id: I737a837ab76240d710e93cc7ea82c33f5e7acc2a

zuul.d/project.yaml

@@ -63,9 +63,7 @@
             voting: false
         - neutron-tempest-with-uwsgi:
             voting: false
-        # TODO(slaweq): add this job again to the check queue when it will
-        # be working fine with python 3
-        #- neutron-centos-7-tripleo-standalone
+        - neutron-centos-8-tripleo-standalone
        #- neutron-ovn-rally-task
         # TripleO jobs that deploy OVN.
         # Note we don't use a project-template here, so it's easier
@@ -74,7 +72,7 @@
         # networking-ovn-tripleo-ci-centos-7-containers-multinode.
         # If you need any support to debug these jobs in case of
         # failures, please reach us on #tripleo IRC channel.
-       #- neutron-ovn-tripleo-ci-centos-7-containers-multinode
+       #- neutron-ovn-tripleo-ci-centos-8-containers-multinode
         - neutron-ovn-tempest-slow:
             voting: false
         - neutron-ovn-tempest-full-multinode-ovs-master:
@@ -110,7 +108,7 @@
         - openstack-tox-lower-constraints:  # from openstack-tox-lower-constraints template
             timeout: 3600
         #- neutron-ovn-rally-task
-        #- neutron-ovn-tripleo-ci-centos-7-containers-multinode
+        #- neutron-ovn-tripleo-ci-centos-8-containers-multinode
 
     experimental:
       jobs:

zuul.d/tripleo.yaml

@@ -1,7 +1,6 @@
 - job:
-    name: neutron-centos-7-tripleo-standalone
-    parent: tripleo-ci-base-standalone
-    nodeset: single-centos-7-node
+    name: neutron-centos-8-tripleo-standalone
+    parent: tripleo-ci-base-standalone-centos-8
     voting: false
     vars:
       featureset: '052'
@@ -31,8 +30,8 @@
       - ^migration/.*$
 
 - job:
-    name: neutron-ovn-tripleo-ci-centos-7-containers-multinode
-    parent: tripleo-ci-base-multinode
+    name: neutron-ovn-tripleo-ci-centos-8-containers-multinode
+    parent: tripleo-ci-centos-8-containers-multinode
     vars:
       nodes: 1ctlr
       featureset: '010'