LMS-663 reduce visibility of getMethodRoles()

SVN: 9392

openbis/source/java/ch/systemsx/cisd/openbis/generic/server/authorization/DefaultAccessController.java

@@ -96,7 +96,7 @@ public final class DefaultAccessController implements IAccessController
         }
     }
 
-    final Set<Role> getMethodRoles(final Method method)
+    private Set<Role> getMethodRoles(final Method method)
     {
         synchronized (methodRolesCache)
         {