Fixed QtNetwork test to use '127.0.0.1' instead of 'localhost'

This is necessary to make all test to be able run on any buildbot machine.
Fix Http server shutdown sequence to avoid deadlocks.

Fixes bug #587

Reviewer: Hugo Parente Lima <hugo.lima@openbossa.org>
          Marcelo Lira <marcelo.lira@openbossa.org>

tests/QtNetwork/accessManager_test.py

@@ -19,20 +19,26 @@ class AccessManagerCase(UsesQCoreApplication):
 
     def tearDown(self):
         super(AccessManagerCase, self).tearDown()
+        if self.httpd:
+            self.httpd.shutdown()
+            self.httpd = None
+
+    def goAway(self):
         self.httpd.shutdown()
+        self.app.quit()
+        self.httpd = None
 
     def slot_replyFinished(self, reply):
         self.assertEqual(type(reply), QNetworkReply)
         self.called = True
-        self.app.quit()
+        self.goAway()
 
     def testNetworkRequest(self):
         manager = QNetworkAccessManager()
         manager.finished.connect(self.slot_replyFinished)
-        manager.get(QNetworkRequest(QUrl("http://localhost:%s" % self.httpd.port())))
+        manager.get(QNetworkRequest(QUrl("http://127.0.0.1:%s" % self.httpd.port())))
         self.app.exec_()
         self.assert_(self.called)
-        self.httpd.shutdown()
 
 if __name__ == '__main__':
     unittest.main()