Content-Type is application/json,application/json

[guy-mograbi-at-gigaspaces]

If I specify 'json:true' and 'headers: { 'Content-Type' : 'application/json' }

the outgoing Content-Type header value is application/json,application/json.

I need to be able to override the Content-Type completely.
if header Content-Type is specified, you should ignore it and not modify it.