Changes

HTTP_Adapter: fix request sending in f_http_tx_request

The function f_http_tx_request has two parameters to spcifiy the body
part of the HTTP request (body and binary_body). The function only
sends a request when either body or binary_body is populated, but not
when none of the two is populated. This means requests without body
part (e.g. a GET request) can not be sent.

There is also no proper interlocking between body and binary_body. We
should make sure that this situation does not occur.

Related: SYS#6824
Change-Id: I258ee6209c35d0601f5a4d82423d2f5c6fbb03cc