tests/integration/standard: update test to reflect new behavior

Previously, the driver relied on the load-balancing policy (LBP) to determine
the order of hosts to connect to. Since the default LBP is Round Robin, each
reconnection would start from a different host.

After removing fake hosts with random IDs at startup, this behavior changed.
When the LBP is not yet initialized, the driver now uses the endpoints provided
by the control connection (CC), so there is no guarantee that different hosts
will be selected on reconnection.

This change updates the test logic to first establish a connection and
initialize the LBP, and only then verify that two subsequent reconnections
land on different hosts in a healthy cluster.

Author: sylwiaszunejko

tests/integration/standard/test_control_connection.py

@@ -101,8 +101,12 @@ def test_get_control_connection_host(self):
 
         # reconnect and make sure that the new host is reflected correctly
         self.cluster.control_connection._reconnect()
-        new_host = self.cluster.get_control_connection_host()
-        assert host != new_host
+        new_host1 = self.cluster.get_control_connection_host()
+
+        self.cluster.control_connection._reconnect()
+        new_host2 = self.cluster.get_control_connection_host()
+
+        assert new_host1 != new_host2
 
     # TODO: enable after https://github.com/scylladb/python-driver/issues/121 is fixed
     @unittest.skip('Fails on scylla due to the broadcast_rpc_port is None')