* WIP test_mmocr 8 out of 20
* test_mmocr_export
* test mmocr apis
* add test data
* add mmocr model unittest 5 passed 1 failed
* finish mmocr unittest
* fix lint
* fix yapf
* fix isort
* fix flake8
* fix docformatter
* fix docformatter
* try to fix unittest after merge master
* Change test.py for backend.DEFAULT
* fix flake8
* fix ut
* fix yapf
* fix ut build
* fix yapf
* fix mmocr_export ut
* fix mmocr_apis ort not cuda
* remove explicit .forward
* remove backendwrapper
* simplify the crnn and dbnet config
* simplify instance_test.json
* add another case of decoder
* increase coverage of test_mmocr_models base_recognizer
* improve coverage
* improve encode_decoder coverage
* reply for grimoire codereview
* what if not check cuda?
* remove image data
* reply to runningleon code review
* fix fpnc
* fix lint
* try to fix CI UT error
* fix fpnc with and wo custom ops
* fix yapf
* skip fpnc when cuda is not ready in ci
* reply for code review
* reply for code review
* fix yapf
* reply for code review
* fix yapf
* fix conflict
* remove unmatched data path
* remove unnecessary comments
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