Moved get_min_max from the mfd to the source object
Moved get_min_max from the mfd to the source object

gem/oq-engine,raoanirudh/oq-risklib,gem/oq-engine,raoanirudh/oq-risklib,vup1120/oq-risklib,gem/oq-engine,g-weatherill/oq-risklib,g-weatherill/oq-risklib,gem/oq-engine,vup1120/oq-risklib,g-weatherill/oq-risklib,gem/oq-engine