Building multiple packages depending on each other is broken

[tpokorra]

this was used for building the kolab packages.
But since I do not run such builds anymore, there was no reason, to bring it over during the Django migration.

So there are still some references to the old db access, which won't work anymore.
eg. con = Database in StorePackageDependancies in BuildHelper.py:

LightBuildServer/lib/BuildHelper.py

Line 130 in a5ce839

def StorePackageDependancies(self, packages, builddepends):

also userconfig=self.config['lbs']['Users'][self.username] in CalculatePackageOrder also in BuildHelper.py