Remove devstack-plugin-ceph-tempest py2 job

devstack-plugin-ceph-tempest is py2 job and not
supposed to run on master gate. Moving
devstack-plugin-ceph-tempest-py3 from experimental pipeline
to check.

Change-Id: I8a15d919f9902315c4a8d27d73dabbcc5be8d8de
diff --git a/.zuul.yaml b/.zuul.yaml
index 02570a6..ae56339 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -665,13 +665,13 @@
         - nova-live-migration:
             voting: false
             irrelevant-files: *tempest-irrelevant-files
+        - devstack-plugin-ceph-tempest-py3:
+            voting: false
+            irrelevant-files: *tempest-irrelevant-files
         - neutron-grenade-multinode:
             irrelevant-files: *tempest-irrelevant-files
         - grenade-py3:
             irrelevant-files: *tempest-irrelevant-files
-        - devstack-plugin-ceph-tempest:
-            voting: false
-            irrelevant-files: *tempest-irrelevant-files
         - puppet-openstack-integration-4-scenario001-tempest-centos-7:
             voting: false
             irrelevant-files: *tempest-irrelevant-files
@@ -722,8 +722,6 @@
             irrelevant-files: *tempest-irrelevant-files
         - legacy-tempest-dsvm-lvm-multibackend:
             irrelevant-files: *tempest-irrelevant-files
-        - devstack-plugin-ceph-tempest-py3:
-            irrelevant-files: *tempest-irrelevant-files
         - tempest-pg-full:
             irrelevant-files: *tempest-irrelevant-files
         - tempest-full-py3-opensuse15: