Replaced groups.ipaserver[0] by ansible_fqdn.

Since we are using docker for running the tests we can no longer rely on
groups.ipaserver[0] as the managed host hostname.

tests/service/test_service_without_skip_host_check.yml

@@ -7,7 +7,7 @@
   # setup
   - name: Get Domain from server name
     set_fact:
-      ipaserver_domain: "{{ groups.ipaserver[0].split('.')[1:] | join ('.') }}"
+      ipaserver_domain: "{{ ansible_fqdn.split('.')[1:] | join ('.') }}"
     when: ipaserver_domain is not defined
 
   - name: Set host1, host2 and svc hosts fqdn