Running the test with a locale other than English make that test fail (#17306)

While tests are supposed to be run in docker, people might still
want to use them on their own boxes.

test/integration/roles/test_git/tasks/main.yml

@@ -421,6 +421,8 @@
   register: remote_url
   args:
     chdir: '{{ checkout_dir }}'
+  environment:
+    LC_ALL: C
 
 - assert:
     that: