Run tempest lvm job on Xenial

More transitioning to Xenial. This runs lvm tempest job on Xenial for
changes to branches >= newton. Older branches continue to run on trusty.

Change-Id: I0409e14b1eff85d62b31f96b7b882dae22cb31ce

jenkins/jobs/devstack-gate.yaml

@@ -2235,6 +2235,7 @@
       - '{pipeline}-tempest-dsvm-layer4-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-full-lio-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-lvm-multibackend-{node}{job-suffix}'
+      - '{pipeline}-tempest-dsvm-lvm-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-zeromq-multibackend-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-full-test-accounts-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-neutron-full-test-accounts-{node}{job-suffix}'
@@ -2262,7 +2263,7 @@
       - '{pipeline}-tempest-dsvm-full-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-ironic-pxe_ssh-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-layer4-{node}{job-suffix}'
-      - '{pipeline}-tempest-dsvm-lvm{job-suffix}'
+      - '{pipeline}-tempest-dsvm-lvm-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-neutron-dvr-ovs-native{job-suffix}'
       - '{pipeline}-tempest-dsvm-neutron-dvr-{node}{job-suffix}'
       - '{pipeline}-tempest-dsvm-neutron-full-non-admin{job-suffix}'

jenkins/jobs/lvm.yaml

@@ -1,5 +1,5 @@
 - job-template:
-    name: '{pipeline}-tempest-dsvm-lvm{job-suffix}'
+    name: '{pipeline}-tempest-dsvm-lvm-{node}{job-suffix}'
     node: '{node}'
 
     wrappers:

zuul/layout.yaml

@@ -12526,7 +12526,8 @@ projects:
       - gate-tempest-dsvm-neutron-full-ssh
       - gate-tempest-dsvm-ironic-pxe_ipa-full-nv
       - gate-tempest-dsvm-lxc-ubuntu-xenial
-      - gate-tempest-dsvm-lvm
+      - gate-tempest-dsvm-lvm-ubuntu-trusty
+      - gate-tempest-dsvm-lvm-ubuntu-xenial
       - gate-tempest-dsvm-neutron-src-oslo.versionedobjects-ubuntu-trusty
       - gate-tempest-dsvm-neutron-src-oslo.versionedobjects-ubuntu-xenial
       - gate-tempest-dsvm-nova-os-vif-nv