Adjust test suite after JDT/UI's migration to JUnit4

- fix our adaptation after test class hierarchy was changed
diff --git a/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/src/org/eclipse/objectteams/otdt/ui/tests/refactoring/adapt/JdtTests.java b/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/src/org/eclipse/objectteams/otdt/ui/tests/refactoring/adapt/JdtTests.java
index a0af800..a6d122a 100644
--- a/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/src/org/eclipse/objectteams/otdt/ui/tests/refactoring/adapt/JdtTests.java
+++ b/testplugins/org.eclipse.objectteams.otdt.ui.tests.refactoring/src/org/eclipse/objectteams/otdt/ui/tests/refactoring/adapt/JdtTests.java
@@ -24,7 +24,7 @@
 import org.eclipse.jdt.internal.corext.refactoring.ParameterInfo;
 
 import base org.eclipse.jdt.ui.tests.refactoring.ChangeSignatureTests;
-import base org.eclipse.jdt.ui.tests.refactoring.RefactoringTest;
+import base org.eclipse.jdt.ui.tests.refactoring.GenericRefactoringTest;
 
 @SuppressWarnings("restriction")
 public team class JdtTests {
@@ -57,7 +57,7 @@
 				helperDoAll("A", "m", signature, newParamInfo, newIndices, oldParamNames, newParamNames, newParameterTypeNames, permutation, newVisibility, deletedIndices, newReturnTypeName);
 		}
 
-		protected class ContentPatching playedBy RefactoringTest {
+		protected class ContentPatching playedBy GenericRefactoringTest {
 
 			String getFileContents(String fileName) <- replace String getFileContents(String fileName);