Validate QueryConstraintGroup and SqlQueryConstraint. Refs gh-155
Validate QueryConstraintGroup and SqlQueryConstraint. Refs gh-155

piotras/midgard-core,piotras/midgard-core,piotras/midgard-core,midgardproject/midgard-core,piotras/midgard-core,midgardproject/midgard-core,midgardproject/midgard-core,midgardproject/midgard-core