test: fixed use of client.host in legacy test:

those tests are not maintained anymore, but as the use of `client.host` as been fixed
elsewhere, it was the occasion to do it there too. Those legacy tests should be ported or
to the new workflow, or deleted if they are not relevant anymore.

sat/test/test_core_xmpp.py

@@ -35,7 +35,7 @@ class SatXMPPClientTest(unittest.TestCase):
     def test_init(self):
         """Check that init values are correctly initialised"""
         self.assertEqual(self.client.profile, Const.PROFILE[0])
-        print(self.client.host)
+        print(self.client.jid.host)
         self.assertEqual(self.client.host_app, self.host)