koji client authentication from python code

[Josh Boyer]

Hi All,

Would it be possible to put the client authentication code found in
the koji CLI into a python module that can be used by other code?
Right now I've found no other way to interact with koji via python
other than copying a large chunk of the code from koji.  It seems even
in the koji codebase, koji-gc and koji-shadow have also done the same.

Specifically, the activate_session, ensure_connection, and koji config
file parsing functions have to be copied.

josh