fixed hashCode in LayeredRefinedAttributeDefinitionImpl breaking the …

…equals contract

infra/common/src/main/java/com/evolveum/midpoint/common/refinery/LayerRefinedAttributeDefinitionImpl.java

@@ -161,7 +161,7 @@ public boolean canModify() {
 	@Override
 	public int hashCode() {
 		final int prime = 31;
-		int result = super.hashCode();
+		int result = 17;
 		result = prime * result + ((layer == null) ? 0 : layer.hashCode());
 		result = prime * result + ((refinedAttributeDefinition == null) ? 0 : refinedAttributeDefinition.hashCode());
 		return result;