HHH-17323 Add annotation processor for tests explicitly

Author: beikov

tooling/metamodel-generator/src/test/java/org/hibernate/jpamodelgen/test/util/CompilationStatement.java

@@ -137,6 +137,8 @@ private List<String> createJavaOptions() {
 		List<String> options = new ArrayList<String>();
 		options.add( "-d" );
 		options.add( TestUtil.getOutBaseDir().getAbsolutePath() );
+		options.add( "-processor" );
+		options.add( JPAMetaModelEntityProcessor.class.getName() );
 
 		// pass orm files if specified
 		if ( !xmlMappingFiles.isEmpty() ) {