Fix: send variables in development mode

Signed-off-by: Miguel M. Almeida <miguelcma@CMA-Retina.local>
Fix on time format on JSON requsts

JSON requests were being created with a wrong time format.
It should send dates in ISO 8601 with milliseconds and Time Zone.

Signed-off-by: Miguel M. Almeida <miguelcma@CMA-Retina.local>