transformers

b815edf6 - [T5, Testst] Add extensive hard-coded integration tests and make sure PT and TF give equal results (#3550)

[T5, Testst] Add extensive hard-coded integration tests and make sure PT and TF give equal results (#3550) * add some t5 integration tests * finish summarization and translation integration tests for T5 - results loook good * add tf test * fix == vs is bug * fix tf beam search error and make tf t5 tests pass