Makes the data posted as application/json directly
available through json.
The previous processing made content transmitted
with the content-type application/json available as
a string in the field of name "" of the returned
json object.
Change-Id: I11615b9b147ee4daa1b1358c2bd36fd839d8a7a9
Signed-off-by: jobol <jose.bollo@iot.bzh>