Update freezer and freezer-api gate jobs

* Added Centos 7 non-voting gate job
    * Removed Ubuntu-trusty

Change-Id: Ieeeddf1d9d496924fe80112ac23e67007df13009

jenkins/jobs/freezer.yaml

@@ -49,5 +49,6 @@
           ./safe-devstack-vm-gate-wrap.sh
 
     publishers:
+      - test-results
       - devstack-logs
       - console-log

jenkins/jobs/projects.yaml

@@ -4301,13 +4301,13 @@
       - openstack-releasenotes-jobs
       - gate-{name}-pylint-{node}:
           node:
-            - ubuntu-trusty
             - ubuntu-xenial
       - gate-osbackup-{name}-dsvm-{node}{suffix}:
-          node:
-            - ubuntu-trusty
-            - ubuntu-xenial
+          node: ubuntu-xenial
           suffix: ''
+      - gate-osbackup-{name}-dsvm-{node}{suffix}:
+          node: centos-7
+          suffix: '-nv'
 
 - project:
     name: freezer-api
@@ -4318,13 +4318,13 @@
       - openstack-releasenotes-jobs
       - gate-{name}-pylint-{node}:
           node:
-            - ubuntu-trusty
             - ubuntu-xenial
       - gate-osbackup-{name}-dsvm-{node}{suffix}:
-          node:
-            - ubuntu-trusty
-            - ubuntu-xenial
+          node: ubuntu-xenial
           suffix: ''
+      - gate-osbackup-{name}-dsvm-{node}{suffix}:
+          node: centos-7
+          suffix: '-nv'
 
 - project:
     name: freezer-dr

zuul/layout.yaml

@@ -9431,14 +9431,11 @@ projects:
       - name: check-requirements
       - name: release-notes-jobs
     check:
-      - gate-osbackup-freezer-dsvm-ubuntu-trusty
       - gate-osbackup-freezer-dsvm-ubuntu-xenial
-      - gate-freezer-pylint-ubuntu-trusty
+      - gate-osbackup-freezer-dsvm-centos-7-nv
       - gate-freezer-pylint-ubuntu-xenial
     gate:
-      - gate-osbackup-freezer-dsvm-ubuntu-trusty
       - gate-osbackup-freezer-dsvm-ubuntu-xenial
-      - gate-freezer-pylint-ubuntu-trusty
       - gate-freezer-pylint-ubuntu-xenial
 
   - name: openstack/freezer-api
@@ -9451,14 +9448,11 @@ projects:
       - name: check-requirements
       - name: release-notes-jobs
     check:
-      - gate-osbackup-freezer-api-dsvm-ubuntu-trusty
+      - gate-osbackup-freezer-api-dsvm-centos-7-nv
       - gate-osbackup-freezer-api-dsvm-ubuntu-xenial
-      - gate-freezer-api-pylint-ubuntu-trusty
       - gate-freezer-api-pylint-ubuntu-xenial
     gate:
-      - gate-osbackup-freezer-api-dsvm-ubuntu-trusty
       - gate-osbackup-freezer-api-dsvm-ubuntu-xenial
-      - gate-freezer-api-pylint-ubuntu-trusty
       - gate-freezer-api-pylint-ubuntu-xenial
 
   - name: openstack/freezer-dr