AppServer: Stop using deprecated SslContextFactory constructor

Use SslContextFactory.Client instead, as suggested in the deprecation
javadoc.

Change-Id: I746c953d3ad549c23d0e43eb4a18fc587e924f93
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

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

@@ -205,7 +205,7 @@ public class AppServer {
 	}
 
 	private SslContextFactory createTestSslContextFactory(String hostName) {
-		SslContextFactory factory = new SslContextFactory(true);
+		SslContextFactory.Client factory = new SslContextFactory.Client(true);
 
 		String dName = "CN=,OU=,O=,ST=,L=,C=";