[GitHub] KellenSunderland opened a new pull request #8689: Mark tests that should only be run nightly.

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KellenSunderland opened a new pull request #8689: Mark tests that should only be run nightly.
URL: https://github.com/apache/incubator-mxnet/pull/8689
 
 
   Sorry for some reason I can't re-open https://github.com/apache/incubator-mxnet/pull/8554.  Here's a new PR. 
   
   As discussed here in a few threads, segmenting tests will go a long way in stabilizing our CI. This PR is a WIP that aims to remove some of the most problematic tests. All tests ignored here either crashed on a P3 instance with the release version (r 0.12) of mxnet from the deep learning AMI, or they took longer to run than a minute. With these tests removed all tests were running in less than 2 minutes on a P3.
   
   Tests are removed with test annotations (aka decorators). Initially I've only used @nightly to indicate a test that would best be run on a nightly basis and @crashing to indicate a crashing test. Once we've decorated tests with annotations we can selectively choose to run them by passing the -a arg to nose (as shown in the new Jenkinsfile).
   
   Also made a few changes to speed up GPU builds on CI.
   
   ## Checklist ##
   ### Essentials ###
   - [ ] Passed code style checking (`make lint`)
   - [x] Changes are complete (i.e. I finished coding on this PR)
   - [x] All changes have test coverage (coverage will now be nightly)
   - [x] For user-facing API changes, API doc string has been updated. For new C++ functions in header files, their functionalities and arguments are well-documented. 
   - [x] To my best knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change

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