ESA JPIP does not support stateless requests

[sfiruch]

According to the official spec (T-REC-T.808-200501) in sections B.2., C.3.1 and K.5.2 a JPIP server should support stateless requests.

If stateless requests are sent to ESA JPIP it replies with

(500) Internal Server Error
Invalid request (channel parameter not found)

The server incorrectly checks parameters, as seen from

esajpip-SWHV/esajpip/esajpip/src/client_manager.cc

Line 200 in bcb434b

err_msg = "Invalid request (channel parameter not found)";