Deb packaging: fixed build to be clean python3 only.
Deb packaging: fixed build to be clean python3 only.

pkug/intelmq,aaronkaplan/intelmq,robcza/intelmq,certtools/intelmq,pkug/intelmq,robcza/intelmq,robcza/intelmq,certtools/intelmq,aaronkaplan/intelmq,pkug/intelmq,robcza/intelmq,pkug/intelmq,aaronkaplan/intelmq,certtools/intelmq