Fix HTTP tests

Since 858b2c92 we have a HTTP authentication implementation hence
we now get different exception messages when required authentication
headers are not available. This broke the HTTP tests.

Change-Id: Ie08c1ec37e497c2a6f70a75f7c59f0805812a5cc
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

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

@@ -280,7 +280,7 @@ public class HttpClientTests extends HttpTestCase {
 				t.openFetch();
 				fail("connection opened even info/refs needs auth basic");
 			} catch (TransportException err) {
-				String status = "401 Unauthorized";
+				String status = "authentication not supported";
 				String exp = dumbAuthBasicURI + ": " + status;
 				assertEquals(exp, err.getMessage());
 			}
@@ -297,7 +297,7 @@ public class HttpClientTests extends HttpTestCase {
 				t.openFetch();
 				fail("connection opened even though service disabled");
 			} catch (TransportException err) {
-				String status = "401 Unauthorized";
+				String status = "authentication not supported";
 				String exp = smartAuthBasicURI + ": " + status;
 				assertEquals(exp, err.getMessage());
 			}

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

@@ -398,7 +398,7 @@ public class SmartClientSmartServerTest extends HttpTestCase {
 				t.push(NullProgressMonitor.INSTANCE, Collections.singleton(u));
 				fail("anonymous push incorrectly accepted without error");
 			} catch (TransportException e) {
-				final String status = "401 Unauthorized";
+				final String status = "authentication not supported";
 				final String exp = remoteURI.toString() + ": " + status;
 				assertEquals(exp, e.getMessage());
 			}