Replace openSUSE experimental check with newer version

We're migrating now to openSUSE 15.0 (yes, 15.0 is newer than 42.3),
remove legacy job and replace with native Zuul v3 job running python3.

Change-Id: Ibac4bfe5a2bddfacf416951f4a92b537bb2c9daf
diff --git a/.zuul.yaml b/.zuul.yaml
index 9ea0810..77d4edd 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -143,6 +143,25 @@
       Base integration test with Neutron networking and py36.
     voting: false
 
+- nodeset:
+    name: openstack-opensuse150-node
+    nodes:
+      - name: controller
+        label: opensuse-150
+    groups:
+      - name: tempest
+        nodes:
+          - controller
+
+- job:
+    name: tempest-full-py3-opensuse150
+    parent: tempest-full-py3
+    nodeset: openstack-opensuse150-node
+    description: |
+      Base integration test with Neutron networking and py36 running
+      on openSUSE Leap 15.0
+    voting: false
+
 - job:
     name: tempest-slow
     parent: tempest-multinode-full
@@ -405,7 +424,7 @@
             irrelevant-files: *tempest-irrelevant-files
         - legacy-tempest-dsvm-neutron-pg-full:
             irrelevant-files: *tempest-irrelevant-files
-        - legacy-tempest-dsvm-neutron-full-opensuse-423:
+        - tempest-full-py3-opensuse150:
             irrelevant-files: *tempest-irrelevant-files
     periodic-stable:
       jobs: