fix a bug in detecting when a repo method param is multivalued

Signed-off-by: Gavin King <gavin@hibernate.org>

tooling/metamodel-generator/src/main/java/org/hibernate/processor/annotation/AnnotationMetaEntity.java

@@ -1918,7 +1918,7 @@ public class AnnotationMetaEntity extends AnnotationMeta {
 						// INTENTIONAL FALL-THROUGH
 					case DECLARED:
 						if ( types.isSameType( parameterType, attributeType) ) {
-							return true;
+							return false;
 						}
 						else {
 							final TypeElement list = context.getTypeElementForFullyQualifiedName(LIST);