livetest.py changes to support Fastmail.fm - use the account's namespace to avoid trying to create mailboxes in   the wrong place - avoid folder names that FM doesn't support when testing with FM - probe authentication first to avoid every test failing slowly when   login details are wrong
livetest.py changes to support Fastmail.fm
- use the account's namespace to avoid trying to create mailboxes in
  the wrong place
- avoid folder names that FM doesn't support when testing with FM
- probe authentication first to avoid every test failing slowly when
  login details are wrong

maxiimou/imapclient