Move tempest-full-rocky-py3 job defintion to stackviz

tempest-full-rocky-py3 was defined in Tempest which is going
to removed[1] from there as rocky is in Extended Maintainance state.

Stackviz need to run the rocky job as it support py3.5 env also.

Renaming the job to avoid the zuul error of duplciate definition of same
job name.

[1] https://review.opendev.org/#/c/722183/1
Change-Id: Ieb1ce1f5c712ffedbacab8dd58cf75cc138deca4

.zuul.yaml

@@ -1,3 +1,9 @@
+- job:
+    name: tempest-full-rocky
+    parent: tempest-full-py3
+    nodeset: openstack-single-node-xenial
+    override-checkout: stable/rocky
+
 - project:
     templates:
       - nodejs8-jobs
@@ -19,7 +25,7 @@
           irrelevant-files: *irrelevant-files
       - tempest-full-stein-py3:
           irrelevant-files: *irrelevant-files
-      - tempest-full-rocky-py3:
+      - tempest-full-rocky:
           irrelevant-files: *irrelevant-files
     post:
       jobs: