[hotfix] Repair ineffective LocalRecoveryITCase

The test did not actually run since the class was refactored with JUnit's parameterized, because it was always running into a NPE and the NPE was then silently swallowed in a shutdown catch-block.

flink-tests/src/test/java/org/apache/flink/test/checkpointing/LocalRecoveryITCase.java

@@ -87,13 +87,15 @@ protected Configuration createClusterConfig() throws IOException {
 
 	private void executeTest(EventTimeWindowCheckpointingITCase delegate) throws Exception {
 		delegate.name = testName;
+		delegate.stateBackendEnum = backendEnum;
 		try {
 			delegate.setupTestCluster();
 			try {
 				delegate.testTumblingTimeWindow();
 				delegate.stopTestCluster();
 			} catch (Exception e) {
 				delegate.stopTestCluster();
+				throw new RuntimeException(e);
 			}
 
 			delegate.setupTestCluster();
@@ -102,9 +104,10 @@ private void executeTest(EventTimeWindowCheckpointingITCase delegate) throws Exc
 				delegate.stopTestCluster();
 			} catch (Exception e) {
 				delegate.stopTestCluster();
+				throw new RuntimeException(e);
 			}
 		} finally {
-			delegate.tempFolder.delete();
+			EventTimeWindowCheckpointingITCase.tempFolder.delete();
 		}
 	}
 }