##### SUMMARY
Since `add_host` and `group_by` actions only modify the runtime inventory, hosts/groups/vars added by them don't survive a `meta: refresh_inventory` call (since that call completely clears the runtime inventory). 

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
InventoryManager

##### ADDITIONAL INFORMATION
After some internal discussion, the general consensus seemed to be that this behavior is an undesirable default. The `add_host` and `group_by` actions should manage a more persistent state independent of the runtime inventory, then apply their changes to the running inventory. When a `meta: refresh_inventory` occurs, the normal dynamic inventory clear/refresh should happen, then reapply the add_host/group_by state. This should probably be the default behavior, but a config switch or a different `meta` action (or an arg to it) to emulate the current behavior could also be created if necessary.

"""Continue to next result"""
        self.next_action.result = NextAction.CONTINUE
        return True
    do_c = do_continue
    def do_redo(self, args):
        """Schedule task for re-execution. The re-execution may not be the next result"""
        self.next_action.result = NextAction.REDO
        return True
    do_r = do_redo
    def do_update_task(self, args):
        """Recreate the task from ``task._ds``, and template with updated ``task_vars``"""
        templar = Templar(None, variables=self.scope['task_vars'])
        task = self.scope['task']
        task = task.load_data(task._ds)
        task.post_validate(templar)
        self.scope['task'] = task
    do_u = do_update_task
    def evaluate(self, args):
        try:
            return eval(args, globals(), self.scope)
        except Exception:
            t, v = sys.exc_info()[:2]
            if isinstance(t, str):
                exc_type_name = t
            else:
                exc_type_name = t.__name__
            display.display('***%s:%s' % (exc_type_name, repr(v)))
            raise
    def do_pprint(self, args):