Don't upgrade master nodes during double upgrade

Signed-off-by: Vadim Rutkovsky <vrutkovs@redhat.com>

playbooks/common/openshift-cluster/upgrades/upgrade_control_plane.yml

@@ -270,8 +270,11 @@
   - include_tasks: docker/tasks/upgrade.yml
     when: l_docker_upgrade is defined and l_docker_upgrade | bool and not openshift_is_atomic | bool
 
+
 - name: Drain and upgrade master nodes
-  hosts: oo_masters_to_config:&oo_nodes_to_upgrade
+  # There is no need to update nodes in the middle of double upgrade
+  # This would skip node update to 3.8 during 3.7->3.9 upgrade
+  hosts: "{{ l_double_upgrade_cp | default(False) | ternary('all:!all', 'oo_masters_to_config:&oo_nodes_to_upgrade') }}"
   # This var must be set with -e on invocation, as it is not a per-host inventory var
   # and is evaluated early. Values such as "20%" can also be used.
   serial: "{{ openshift_upgrade_control_plane_nodes_serial | default(1) }}"