Apparently somebody found it a good idea to remove the getBugTasks()
method.  Also the darn thing won't run on Python 3.  So apparently it's
mostly unmaintained, except that functions that we need are removed.

For future reference: it can be installed on non-Ubuntu systems by:
    pip install -v --user launchpadlib

Change-Id: Ib7b0a46011dffcfe091f5bb73ed19b9dc311046c