make grenade multinode run more places

We should make grenade multinode run on every grenade change in a
non-voting way to get this into a stable state.

Add to Nova experimental as well to be able to test changes to fix
things from there.

Change-Id: I9f42051ad3bfee338e581be527a7eb13f3ff4aa3

jenkins/jobs/projects.yaml

@@ -885,6 +885,11 @@
           node: devstack-trusty-2-node
           branch-designator: ''
           branch-override: default
+      - '{pipeline}-grenade-dsvm-multinode{branch-designator}':
+          pipeline: gate
+          node: devstack-trusty-2-node
+          branch-designator: '-nv'
+          branch-override: default
       - '{pipeline}-tempest-dsvm-multinode-full{branch-designator}':
           pipeline: gate
           node: devstack-trusty-2-node

zuul/layout.yaml

@@ -2121,6 +2121,7 @@ projects:
       - gate-grenade-dsvm-partial-ncpu
       - gate-grenade-dsvm-ironic-sideways
       - gate-grenade-dsvm-heat-nv
+      - gate-grenade-dsvm-multinode-nv
       - gate-grenade-publish-docs
     gate:
       - gate-grenade-dsvm
@@ -2132,7 +2133,6 @@ projects:
     post:
       - grenade-publish-docs
     experimental:
-      - gate-grenade-dsvm-multinode
       - gate-grenade-dsvm-neutron-forward
       - gate-grenade-dsvm-neutron-sideways
       - gate-grenade-dsvm-ironic
@@ -6359,6 +6359,7 @@ projects:
       - nova-coverage
     experimental:
       - gate-grenade-dsvm-forward
+      - gate-grenade-dsvm-multinode
       - gate-nova-pip-missing-reqs
       - gate-tempest-dsvm-nova-wsgi-full
       - gate-tempest-dsvm-neutron-multinode-full