load registered class metadata when getting implementors

git-svn-id: https://svn.apache.org/repos/asf/incubator/openjpa/trunk@443016 13f79535-47bb-0310-9956-ffa450edef68

openjpa-kernel/src/main/java/org/apache/openjpa/meta/MetaDataRepository.java

@@ -1017,7 +1017,7 @@ public class MetaDataRepository
             return EMPTY_METAS;
 
         // get impls of given interface / abstract class
-        processRegisteredClasses();
+        loadRegisteredClassMetaData(envLoader);
         Collection vals = (Collection) _impls.get(cls);
         ClassMetaData meta;
         Collection mapped = null;