[Tests] Fix test_http_proxy_with_cert_file after the added proxy authentication support

The test had to be updated because of the changes introduced in 352fb43

Author: ddraganov

tests/test_connect.py

@@ -116,7 +116,7 @@ def test_http_proxy_with_cert_file(self, hs):
             certKeyFile='my_key_file', certFile='my_cert_file').GetConnection()
         conn.request('GET', '/')
         hs.assert_called_once_with('vcsa:80', cert_file='my_cert_file', key_file='my_key_file')
-        conn.set_tunnel.assert_called_once_with('sdkTunnel:8089')
+        conn.set_tunnel.assert_called_once_with('sdkTunnel:8089', headers={})
 
     @tests.VCRTestBase.my_vcr.use_cassette('http_proxy.yaml',
                       cassette_library_dir=tests.fixtures_path,