Use module_hotfixes for yum_repository

Since ansible-core 2.11 it's possible to use module_hotfixes argument of
yum_repository instead of standalone task. This improves role
idempotency and simplifies logic.

Change-Id: I65a79d82816665dc903c259eab11c8f02361e51d

tasks/galera_install_dnf.yml

@@ -103,6 +103,7 @@
     gpgkey: "{{ galera_repo.gpgkey | default(omit) }}"
     gpgcheck: yes
     enabled: yes
+    module_hotfixes: true
     priority: 25
     state: "{{ galera_repo.state | default(omit) }}"
   register: add_galera_repos
@@ -110,26 +111,6 @@
   retries: 5
   delay: 2
 
-- name: Enable module_hotfixes
-  lineinfile:
-    dest: "/etc/yum.repos.d/{{ galera_repo.name }}.repo"
-    line: "module_hotfixes=1"
-    regexp: "^module_hotfixes"
-    insertafter: "^enabled"
-  when:
-    - galera_install_method == 'external_repo'
-
-# When changing the repo URL, the metadata does
-# not reliably update, resulting in the right
-# URL being used, but the wrong package list.
-# This is why we force the metadata to be
-# cleaned out whenever the repo config changes.
-- name: Force the expiry of the repo metadata
-  command: "{{ ansible_facts['pkg_mgr'] }} clean metadata"
-  when: add_galera_repos is changed
-  tags:
-    - skip_ansible_lint
-
 - name: Install galera role remote packages
   package:
     name: "{{ galera_packages_list }}"