Fixup recover_control_plane with Ansible 2.9 (#5806)

Tests as filters support is removed as of Ansible 2.9
https://docs.ansible.com/ansible/latest/porting_guides/porting_guide_2.5.html#jinja-tests-used-as-filters

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

roles/recover_control_plane/etcd/tasks/main.yml

@@ -12,7 +12,7 @@
 
 - name: Set healthy fact
   set_fact:
-    healthy: "{{ etcd_endpoint_health.stderr | match('Error: unhealthy cluster') }}"
+    healthy: "{{ etcd_endpoint_health.stderr is match('Error: unhealthy cluster') }}"
   when:
     - groups['broken_etcd']