Remove use of JDK 1.5-only method String.contains().

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@548431 13f79535-47bb-0310-9956-ffa450edef68

openjpa-kernel/src/test/java/org/apache/openjpa/ee/TestWASManagedRuntime.java

@@ -52,6 +52,6 @@ public class TestWASManagedRuntime extends TestCase {
             getClassName(WASManagedRuntime.INTERFACE);
         assertTrue("message should have contained "
             + interfaceName + ", but was '" + msg + "'",
-            msg.contains(interfaceName));
+            msg.indexOf(interfaceName) != -1);
     }
 }