ansible-test: Do not use automatic field numbering specification

Automatic field numbering specification is not allowed by ansible-test.

roles/ipareplica/library/ipareplica_enable_ipa.py

@@ -171,7 +171,7 @@ def main():
         # Print a warning if CA role is only installed on one server
         if len(ca_servers) == 1:
             msg = u'''
-                WARNING: The CA service is only installed on one server ({}).
+                WARNING: The CA service is only installed on one server ({0}).
                 It is strongly recommended to install it on another server.
                 Run ipa-ca-install(1) on another master to accomplish this.
             '''.format(ca_servers[0])

roles/ipareplica/library/ipareplica_prepare.py

@@ -469,7 +469,7 @@ def main():
     env._finalize_core(**dict(constants.DEFAULT_CONFIG))
 
     # pylint: disable=no-member
-    xmlrpc_uri = 'https://{}/ipa/xml'.format(ipautil.format_netloc(env.host))
+    xmlrpc_uri = 'https://{0}/ipa/xml'.format(ipautil.format_netloc(env.host))
     if hasattr(ipaldap, "realm_to_ldapi_uri"):
         realm_to_ldapi_uri = ipaldap.realm_to_ldapi_uri
     else:
@@ -609,7 +609,7 @@ def main():
     ansible_log.debug("-- REMOTE_API --")
 
     ldapuri = 'ldaps://%s' % ipautil.format_netloc(config.master_host_name)
-    xmlrpc_uri = 'https://{}/ipa/xml'.format(
+    xmlrpc_uri = 'https://{0}/ipa/xml'.format(
         ipautil.format_netloc(config.master_host_name))
     remote_api = create_api(mode=None)
     remote_api.bootstrap(in_server=True,

roles/ipareplica/library/ipareplica_test.py

@@ -450,7 +450,7 @@ def main():
     if installer.ca_cert_files is not None:
         if not isinstance(installer.ca_cert_files, list):
             ansible_module.fail_json(
-                msg="Expected list, got {!r}".format(installer.ca_cert_files))
+                msg="Expected list, got {0!r}".format(installer.ca_cert_files))
         for cert in installer.ca_cert_files:
             if not os.path.exists(cert):
                 ansible_module.fail_json(msg="'%s' does not exist" % cert)