Update 'Maintained' stable branch jobs on master gate

We have stable/yoga released and stable/ussuri is in
'Extended Maintenance' state. Current 'Maintained'
stable branches are yoga, xena, wallaby, and victoria.

As per tempest stable branch testing policy[1], adding the
newly released stable/yoga job and remove the EM stable/ussuri
and stable/victoria job.

[1] https://docs.openstack.org/tempest/latest/stable_branch_testing_policy.html

Change-Id: I550f33a18cc8318d97072115e0df1462821ecb0e

.zuul.yaml

@@ -5,10 +5,9 @@
     check:
       jobs:
         - senlin-dsvm-tempest-py3-api
+        - senlin-dsvm-tempest-py3-api-yoga
         - senlin-dsvm-tempest-py3-api-xena
         - senlin-dsvm-tempest-py3-api-wallaby
-        - senlin-dsvm-tempest-py3-api-victoria
-        - senlin-dsvm-tempest-py3-api-ussuri
         - senlin-tempest-api-ipv6-only
         - senlin-dsvm-tempest-py3-functional
         - senlin-dsvm-tempest-py3-integration:
@@ -20,6 +19,11 @@
         - senlin-tempest-api-ipv6-only
         - senlin-dsvm-tempest-py3-functional
 
+- job:
+    name: senlin-dsvm-tempest-py3-api-yoga
+    parent: senlin-dsvm-tempest-py3-api
+    override-checkout: stable/yoga
+
 - job:
     name: senlin-dsvm-tempest-py3-api-xena
     parent: senlin-dsvm-tempest-py3-api
@@ -29,13 +33,3 @@
     name: senlin-dsvm-tempest-py3-api-wallaby
     parent: senlin-dsvm-tempest-py3-api
     override-checkout: stable/wallaby
-
-- job:
-    name: senlin-dsvm-tempest-py3-api-victoria
-    parent: senlin-dsvm-tempest-py3-api
-    override-checkout: stable/victoria
-
-- job:
-    name: senlin-dsvm-tempest-py3-api-ussuri
-    parent: senlin-dsvm-tempest-py3-api
-    override-checkout: stable/ussuri