Move os_tempest role var at the top of play level

Once tempest run finishes using os_tempest role,
python_venv_build noop handler[1.] is called and the playbook
fails with tempest_install_method undefined var as it's scope
is only for that task when role is called.

Moving the var at the top of the play keeps the scope of the
var for the whole play.

Closes-Bug: #https://bugs.launchpad.net/tripleo/+bug/1838496

Change-Id: I58082b307cb5b3f9ff908c29c8e24b9b970561de
Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>

playbooks/multinode-standalone.yml

@@ -48,11 +48,15 @@
 
 - name: Validate the deployment
   hosts: undercloud
+  # Note(chkumar246): Moved the os_tempest related var at the top
+  # of play level in order to have scope for the whole of the play
+  # https://bugs.launchpad.net/tripleo/+bug/1838496
+
+  vars:
+    tempest_install_method: distro
+    tempest_cloud_name: 'standalone'
   tasks:
     - include_tasks: tempest.yml
-      vars:
-        tempest_install_method: distro
-        tempest_cloud_name: 'standalone'
       when:
         - not run_tempest|bool
         - use_os_tempest is defined

playbooks/multinode-validate.yml

@@ -22,12 +22,15 @@
 
 - name: Validate the deployment
   hosts: undercloud
+  # Note(chkumar246): Moved the os_tempest related var at the top
+  # of play level in order to have scope for the whole of the play
+  # https://bugs.launchpad.net/tripleo/+bug/1838496
+  vars:
+    tempest_install_method: distro
+    tempest_cloud_name: 'overcloud'
+    tempest_cidr: '192.168.24.0/24'
   tasks:
     - include_tasks: tempest.yml
-      vars:
-        tempest_install_method: distro
-        tempest_cloud_name: 'overcloud'
-        tempest_cidr: '192.168.24.0/24'
       when:
         - not run_tempest|bool
         - use_os_tempest is defined