SccReceiverInternalError, doesn't link
SccContextElementNotFound
SccLengthRequired
FIX httpStatusCodeString linking
SccRequestEntityTooLarge
SccUnsupportedMediaType
SccInvalidParameter
SccNotImplemented
SccReceiverInternalError
FIX all related tests
a few improvements found during PR review
Merge pull request #179 from telefonicaid/hardening/statuscode_mapping

Hardening/statuscode mapping