Update Aquilon broker setup.cfg package dependencies
Update Aquilon broker setup.cfg package dependencies

Add git version 1.8.4 dependency, remove ipython package
from dependecy list as this is not required by the main application.

Addresses issues raised by community:
https://github.com/quattor/aquilon/issues/50
https://github.com/quattor/aquilon/issues/45
https://github.com/quattor/aquilon/issues/21

Addresses Issue: Jira/AQUILON-4494

Change-Id: Ia929b07834c391a14a5a43a9c5b224175b224466
Reviewed-By: Nathan Dimmock <790b96b72b5ebbbfb73a2caa0f14d8894a9e0fd7@morganstanley.com>

quattor/aquilon,quattor/aquilon,quattor/aquilon