* Adding initial unit test and Jenkins code.
Fixing scope of unit tests
Adding unit tests and files for CI
Fixing Jenkinsfile
* Removing typos from Jenkinsfile
* Making some fixes to the Jenkins file; temporarily disabling MPI
* Making corrections to Jenkinsfile
* Correcting dockerNodes entry in Jenkinsfile
* Fixed Jenkinsfile for CI
* Correcting Jenkinsfile for CI
* Updating README to include instructions on how to run unit tests.
[ROCm/rccl-tests commit: 924521ff57]
Stanley Tsang