Automatic update of fbcode/onnx to 27d4b617e7097cda7d0d4c45ff2b09d248f33179 (#19718)

Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19718

Previous import was 0e8d2bc5e51455c70ef790b9f65aa632ed9bc8a7

Included changes:
- **[27d4b617](https://github.com/onnx/onnx/commit/27d4b617)**: Adding RoIAlign operator (#1869) <Sam Pepose>
- **[70c9026c](https://github.com/onnx/onnx/commit/70c9026c)**: add ReverseSequence op (#1927) <Guoliang Hua>
- **[ed2db02a](https://github.com/onnx/onnx/commit/ed2db02a)**: README.md: Update badge style for build status (#1942) <Yulong Wang>
- **[e36d3b54](https://github.com/onnx/onnx/commit/e36d3b54)**: Enable python 3.7 in CI for Windows (#1943) <Raymond Yang>

Differential Revision: D15077516

fbshipit-source-id: c8c6935381ff5a96ab9a4ee519685814f4ea6e59

caffe2/python/onnx/tests/onnx_backend_test.py

@@ -67,6 +67,8 @@ backend_test.exclude(r'(test_hardsigmoid'  # Does not support Hardsigmoid.
                      '|test_isinf.*'  # Needs implementation
                      '|test_mod.*'  # Needs implementation
                      '|test_nonmaxsuppression.*'  # Needs implementation
+                     '|test_reversesequence.*'  # Needs implementation
+                     '|test_roialign.*'  # Needs implementation
                      ')')
 
 # Quick patch to unbreak master CI, is working on the debugging.