Configure Semaphore used in TestRequestLog to be fair

Bug: 528187
Change-Id: I26c94ad7f802fc1dbe72d63a7ea346dc6e19ff94
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit.junit.http/src/org/eclipse/jgit/junit/http/TestRequestLog.java

@@ -63,7 +63,7 @@ class TestRequestLog extends HandlerWrapper {
 
 	private final List<AccessEvent> events = new ArrayList<>();
 
-	private final Semaphore active = new Semaphore(MAX);
+	private final Semaphore active = new Semaphore(MAX, true);
 
 	/** Reset the log back to its original empty state. */
 	void clear() {