Add initial files for tripleo in the gate.

Add jenkins job builder tripleo script (based on pbr).

Add prepare_node_tripleo.sh which will be called by nodepool.

Add prepare_tripleo.sh script, based on the devstack script
but pulling in just the tripleo repositories with pull-tools
tripleo-incubator script.

Add tripleo stanza to nodepool itself.

Update site.pp with variables for tripleo authentication.

Add experimental pipeline to zuul's layout.yaml for this job on
tripleo-incubator.

Change-Id: I03433d08585ba3a783fe939264d7521cafa83e41

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

@@ -0,0 +1,34 @@
+- job:
+    name: 'gate-tripleo-deploy'
+    node: 'tripleo-precise'
+
+    wrappers:
+      - timeout:
+          timeout: 120
+          fail: true
+      - timestamps
+
+    builders:
+      - devstack-checkout
+      - shell: |
+          #!/bin/bash -xe
+          export PYTHONUNBUFFERED=true
+          export DEVSTACK_GATE_TEMPEST=0
+          export DEVSTACK_GATE_EXERCISES=0
+          function gate_hook {{
+              bash -xe $BASE/tripleo-incubator/toci_gate_test.sh
+          }}
+          export -f gate_hook
+          cp devstack-gate/devstack-vm-gate-wrap.sh ./safe-devstack-vm-gate-wrap.sh
+          ./safe-devstack-vm-gate-wrap.sh
+      - link-logs
+
+    publishers:
+      - scp:
+          site: 'static.openstack.org'
+          files:
+            - target: 'logs/$LOG_PATH'
+              source: '**/pip.log'
+              keep-hierarchy: false
+              copy-after-failure: true
+      - console-log