ansible_freeipa_module: api_command should not have extra try clause

api_command is always used within try clause, therefore it is not needed
to have an extra try clause within api_command. Additionally it is needed
to get the dofferent errors in the next level.

plugins/module_utils/ansible_freeipa_module.py

@@ -122,12 +122,9 @@ def api_connect():
 
 def api_command(module, command, name, args):
     """
-    Call ipa.Command, use AnsibleModule.fail_json for error handling
+    Call ipa.Command
     """
-    try:
-        return api.Command[command](name, **args)
-    except Exception as e:
-        module.fail_json(msg="%s: %s" % (command, e))
+    return api.Command[command](name, **args)
 
 
 def execute_api_command(module, principal, password, command, name, args):