LU-16694 tests: rewrite socket client, server in python

LU-16694 tests: rewrite socket client, server in python

Rewrite socketclient and socketserver in python,
rather than perl. This should bring us closer
to dropping perl requirements from Lustre packages.

Test-Parameters: trivial testlist=sanity env=ONLY=54a,ONLY_REPEAT=100
Signed-off-by: Timothy Day <timday@amazon.com>
Change-Id: I1c03e13993af147ce7d487b8d66320f4f99eb676
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/52478
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Feng Lei <flei@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>