Message 64058 - Python tracker

Changes only affect test files.

test_smtplib.py before: 39.7s
test_smtplib.py after: 0.8s

socket.getfqdn() calls were causing all the slowness.  Added a
mock_socket.py file to handle some tests.  For other tests that tested
both server side and client side of the smtp libraries, mocked out
socket.getfqdn() only.