Use method reference in TestUtil instead of lambda

Change-Id: If5513ca80286c40acd8c9cdffbb8bbb47377f8fc
Signed-off-by: Lars Vogel <Lars.Vogel@vogella.com>
diff --git a/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/TestUtil.java b/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/TestUtil.java
index 30b893b..1ebc4c2 100644
--- a/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/TestUtil.java
+++ b/tests/org.eclipse.core.tests.resources/src/org/eclipse/core/tests/resources/TestUtil.java
@@ -36,7 +36,7 @@
 		if (timedOut) {
 			// We don't expect any extra jobs run during the test: try to cancel them
 			log(IStatus.INFO, owner, "Trying to cancel running jobs: " + getRunningOrWaitingJobs(null));
-			getRunningOrWaitingJobs(null).forEach(job -> job.cancel());
+			getRunningOrWaitingJobs(null).forEach(Job::cancel);
 			waitForJobs(owner, 5, 1000);
 		}