Temporarily disable GracefulShutdownFunctionalTests

Issue #5308

Author: fmbenhassine

spring-batch-samples/src/test/java/org/springframework/batch/samples/restart/stop/GracefulShutdownFunctionalTests.java

@@ -22,6 +22,7 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 
@@ -62,6 +63,7 @@
  * @author Mahmoud Ben Hassine
  *
  */
+@Disabled("Fails intermittently") // https://github.com/spring-projects/spring-batch/issues/5308
 @ExtendWith(SpringExtension.class)
 class GracefulShutdownFunctionalTests {