HttpService.SendRequest - support TLS 1.2

At wyby project, we make a request to HTTPS xml interface of CC payment provider. They have detected and told us that we are using TLS 1.0 or 1.1 version. They warn us that we had to switch to TLS 1.2 otherwise the services woun’t be available after 4.3.2018.

We send requests by ‘Service call workflow step’, using service ‘HttpService’ and a method ‘SendRequest’ (we send POST) We don’t have any client certificate.

Done. Current master is able to send WebRequests using TLS 1.2