Add experimental tempest and grenade trusty jobs

Once we have trusty nodes we can run tempest and grenade on them in the
experimental queue as the first step in migrating juno from precise to
trusty. Start the process with this change.

Change-Id: Ib96bd2439e09c21b7fc69da910e3d4073995b8a5

modules/openstack_project/files/jenkins_job_builder/config/projects.yaml

@@ -1496,6 +1496,12 @@
       # Special jobs for devstack-gate
       - devstack-gate-jobs:
           node: devstack-precise
+      # Trusty node testing
+      - devstack-jobs:
+          pipeline: check
+          node: 'devstack-trusty'
+          branch-designator: '-trusty'
+          branch-override: default
 
 
 - project:

modules/openstack_project/files/zuul/layout.yaml

@@ -2428,6 +2428,9 @@ projects:
       - check-tempest-master-dsvm-full-havana
       - check-tempest-master-dsvm-neutron-havana
       - check-tempest-dsvm-f20
+      - check-tempest-dsvm-full-trusty
+      - check-tempest-dsvm-neutron-trusty
+      - check-grenade-dsvm-trusty
 
   - name: openstack-dev/grenade
     check:
@@ -2621,6 +2624,9 @@ projects:
       - check-tempest-master-dsvm-full-havana
       - check-tempest-master-dsvm-neutron-havana
       - check-tempest-dsvm-f20
+      - check-tempest-dsvm-full-trusty
+      - check-tempest-dsvm-neutron-trusty
+      - check-grenade-dsvm-trusty
     experimental-tripleo:
       - check-tripleo-ironic-seed-precise
       - check-tripleo-undercloud-precise