Fixed PlannerEdge to handle 'isSelfClosure' edges
Fixed PlannerEdge to handle 'isSelfClosure' edges

lolski/grakn,lolski/grakn,lolski/grakn,graknlabs/grakn,graknlabs/grakn,graknlabs/grakn,graknlabs/grakn,lolski/grakn