know the rgw clients tools version during the test runs.

[rakeshgm]

while running the tests, we use couple of client tools for our automation like boto, boto3, s3cmd etc. It will be a good information to dump the versions to a file when the tests are triggered.

This may help us analyse the test failures if the failure is caused by version change in one of the client tools.

some of the client tools are in requirement.txt file