Update all jobs to at least Train

With the removal of official support of all openstack releases
older than T, this change updates each job to at least use the
Train release.

Change-Id: I6b41d79495a74b1072995ae5036f56bfbf585c25

zuul.d/jobs.yaml

@@ -322,7 +322,7 @@
     nodeset: openstack-helm-single-node
     vars:
       osh_params:
-        openstack_release: stein
+        openstack_release: train
         container_distro_name: ubuntu
         container_distro_version: bionic
         feature_gates: apparmor
@@ -375,7 +375,7 @@
     nodeset: openstack-helm-single-node
     vars:
       osh_params:
-        openstack_release: stein
+        openstack_release: train
         container_distro_name: ubuntu
         container_distro_version: bionic
       gate_scripts_relative_path: ../openstack-helm-infra
@@ -422,7 +422,7 @@
       - openstack/openstack-helm
     vars:
       osh_params:
-        openstack_release: stein
+        openstack_release: train
         container_distro_name: ubuntu
         container_distro_version: bionic
       kubernetes_keystone_auth: true
@@ -554,7 +554,7 @@
     nodeset: openstack-helm-single-node
     vars:
       osh_params:
-        openstack_release: stein
+        openstack_release: train
         container_distro_name: ubuntu
         container_distro_version: bionic
         feature_gates: local-storage
@@ -594,7 +594,7 @@
     nodeset: openstack-helm-single-node
     vars:
       osh_params:
-        openstack_release: stein
+        openstack_release: train
         container_distro_name: ubuntu
         container_distro_version: bionic
         feature_gates: ssl
@@ -631,7 +631,7 @@
     nodeset: openstack-helm-single-node
     vars:
       osh_params:
-        openstack_release: stein
+        openstack_release: train
         container_distro_name: ubuntu
         container_distro_version: bionic
         feature_gates: "ssl,apparmor"