add Headers to http command endpoint

[mrutid]

Component

IotAgent-json

Is your feature request related to a problem? Please describe

Some endpoints require header

Describe the solution you'd like

Along with "endpoint" provide more "HTTP Option" fields (JEXL would be desired)

Describe alternatives you've considered

No response

The systemd version you checked that didn't have the feature you are asking for

No response

[AlvaroVega]

Involved code:

iotagent-json/lib/bindings/HTTPBinding.js

Line 211 in e769ee1

headers: {

PR quite related: (where content-type was introduced)
#635

Maybe adding a new field 'headers' to command definition to include a json array of headers:

Device command definition in mongodb:

{
   "name": "reset",
   "type": "command",
   "value": "",
   "expression": "brand + '_' + reset",
   "headers": { 
      "myheader1": "exp1",
      "myheader2": "exp2"
   },
   "object_id": "reset"
}

[fgalan]

Should this issue be closed now that associated PR #874 has been merged?