* Added python test runner to execute rccl tests
* Disabled capture output to avoid hangs
* Add RCCL_TEST_MPI_HOSTFILE env var to get the hostfile
* Converted test_type to boolean gtest flag
* Removed unused return values
* Added custom rccl library usage
* Removed json output
* Updates to test_runner: added num_gpus field
* Address review comments
* Prepend env vars for single node, single process executions
* Added separate enums for exit and result codes
* Update configuration files
* Moved configurations to its own dir
* Address review comments
* Update tools/scripts/test_runner/README.md
Co-authored-by: Corey Derochie <161367113+corey-derochie-amd@users.noreply.github.com>
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Co-authored-by: Corey Derochie <161367113+corey-derochie-amd@users.noreply.github.com>
Atul Kulkarni
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