[DROOLS-786] simplify the override of minimal required JDK
[DROOLS-786] simplify the override of minimal required JDK

adrielparedes/guvnor,porcelli-forks/guvnor,hxf0801/guvnor,etirelli/guvnor,etirelli/guvnor,kiereleaseuser/guvnor,mbiarnes/guvnor,wmedvede/guvnor,baldimir/guvnor,baldimir/guvnor,hxf0801/guvnor,wmedvede/guvnor,droolsjbpm/guvnor,porcelli-forks/guvnor,droolsjbpm/guvnor,nmirasch/guvnor,etirelli/guvnor,adrielparedes/guvnor,nmirasch/guvnor,mbiarnes/guvnor,baldimir/guvnor,hxf0801/guvnor,kiereleaseuser/guvnor,droolsjbpm/guvnor,kiereleaseuser/guvnor,adrielparedes/guvnor,wmedvede/guvnor,nmirasch/guvnor,porcelli-forks/guvnor,mbiarnes/guvnor