Fix ansible syntax to avoid ansible warnings (one more) (#3536)

* warning on meta flush_handlers

* avoid rm

* avoid "Module remote_tmp /root/.ansible/tmp did not exist and was created with a mode of 0700, this may cause issues when running as another user. To avoid this, create the remote_tmp dir with the correct permissions manually" warning on subsequent tasks using blockinfile

* is match

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -120,7 +120,7 @@
 
 - name: Stop if bad hostname
   assert:
-    that: inventory_hostname | match("[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$")
+    that: inventory_hostname is match("[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$")
     msg: "Hostname must consist of lower case alphanumeric characters, '.' or '-', and must start and end with an alphanumeric character"
   ignore_errors: "{{ ignore_assert_errors }}"