* process unit test matched test_p*

* fix ci bug

* fix ci bugs

* fix codestyle

* remove all tests about pe and restore some irrelated tests

* delete test_parallel_executor_test_while_train.py

* assert len(self.places) == 1

* remove with_data_parallel in unittest

* remove multi-card related checks

* remove with_data_parallel in test_multiprocess_dataloader*

* fix error hint

* fix typo