Update postgresql.py
Update postgresql.py

Former-commit-id: 2512c40dcb6106b5f6762cd131c00ebea3eca0e4
aaronkaplan/intelmq,sch3m4/intelmq,aaronkaplan/intelmq,certtools/intelmq,robcza/intelmq,pkug/intelmq,robcza/intelmq,sch3m4/intelmq,robcza/intelmq,pkug/intelmq,certtools/intelmq,sch3m4/intelmq,pkug/intelmq,robcza/intelmq,certtools/intelmq,aaronkaplan/intelmq,pkug/intelmq,sch3m4/intelmq