[releng] Fix boxing warning

Use Integer.valueOf() to avoid the warning by implicit conversion due to
usage as argument object in String.format().

Change-Id: Ib314f629d54ae1ce9729c3837d66ce8982a1898a
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>

org.eclipse.jgit/src/org/eclipse/jgit/transport/JschConfigSessionFactory.java

@@ -278,7 +278,8 @@ public abstract class JschConfigSessionFactory extends SshSessionFactory {
 		if (s.getPort() == SSH_PORT) {
 			return s.getHost();
 		}
-		return String.format("[%s]:%d", s.getHost(), s.getPort()); //$NON-NLS-1$
+		return String.format("[%s]:%d", s.getHost(), //$NON-NLS-1$
+				Integer.valueOf(s.getPort()));
 	}
 
 	private void copyConfigValueToSession(Session session, Config cfg,