Fix the client.

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Add swap keyword to the read_file function (hrpt reader)

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>
Do not forwath the heartbeat (should we ?)

Signed-off-by: Martin Raspaud <martin.raspaud@smhi.se>