createTestConnection uses lookup-test.csx.cam.ac.uk

createTestConnection method connects with to be removed https://lookup-test.csx.cam.ac.uk/ (server to be turned off sooner than 'csx' domain removal)

• Update client use https://lookup-test.srv.uis.cam.ac.uk/
• Republish clients in supported languages
• (Optional) Change lookup-test.csx.cam.ac.uk to be CNAME to above (and update (paid) cert to include it as Subject Alternative Name) - decided as not necessary