Rename neutron-tempest-plugin-jobs-stable template

In fact in this template there are only jobs using
stable/queens branch so name should reflect that.

Change-Id: I7c4e6a6d35bba456c130ee2f8376c721659b6bef
Related-Bug: #1777190
diff --git a/.zuul.yaml b/.zuul.yaml
index 247b100..cd757d9 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -236,7 +236,7 @@
         - build-openstack-sphinx-docs
 
 - project-template:
-    name: neutron-tempest-plugin-jobs-stable
+    name: neutron-tempest-plugin-jobs-queens
     check:
       jobs:
         - neutron-tempest-plugin-api-queens
@@ -250,4 +250,4 @@
 - project:
     templates:
       - neutron-tempest-plugin-jobs
-      - neutron-tempest-plugin-jobs-stable
+      - neutron-tempest-plugin-jobs-queens