Suppress "unchecked cast" warnings related to UploadPackFactory.DISABLED

Change-Id: Id74694e18fec326df2b04eb796b46ccc6484b23f
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/DefaultReceivePackFactoryTest.java

 		factory = new DefaultReceivePackFactory();
 	}
 
+	@SuppressWarnings("unchecked")
 	@Test
 	public void testDisabledSingleton() throws ServiceNotAuthorizedException {
 		factory = (ReceivePackFactory<HttpServletRequest>) ReceivePackFactory.DISABLED;

org.eclipse.jgit.http.test/tst/org/eclipse/jgit/http/test/DefaultUploadPackFactoryTest.java

 		factory = new DefaultUploadPackFactory();
 	}
 
+	@SuppressWarnings("unchecked")
 	@Test
 	public void testDisabledSingleton() throws ServiceNotAuthorizedException {
 		factory = (UploadPackFactory<HttpServletRequest>) UploadPackFactory.DISABLED;