Check project delete

def _check_delete(self):
        '''Check project delete'''
        now = time.time()
        for project in list(itervalues(self.projects)):
            if project.db_status != 'STOP':
                continue
            if now - project.updatetime < self.DELETE_TIME:
                continue
            if 'delete' not in self.projectdb.split_group(project.group):
                continue

            logger.warning("deleting project: %s!", project.name)
            del self.projects[project.name]
            self.taskdb.drop(project.name)
            self.projectdb.drop(project.name)
            if self.resultdb:
                self.resultdb.drop(project.name)
            for each in self._cnt.values():
                del each[project.name]