Minor docstring update

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16450 b56c7a7d-ac47-0410-a905-b6f7de78896a
Fix on_client_connect test to expect current katcp library version

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16451 b56c7a7d-ac47-0410-a905-b6f7de78896a
Fix katcp timestamp sensor constructor helper function

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16454 b56c7a7d-ac47-0410-a905-b6f7de78896a
Improve katcp testutils for dealing with message ids

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16455 b56c7a7d-ac47-0410-a905-b6f7de78896a
Remove outdated comment in kattypes

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16477 b56c7a7d-ac47-0410-a905-b6f7de78896a
(neilen, rosly) Fix katcp tx connection messages

git-svn-id: https://katfs.kat.ac.za/svnDS/code/katcp-python/trunk@16478 b56c7a7d-ac47-0410-a905-b6f7de78896a