Make batch request name optional

[hskrishna29]

1. The name parameter for the batch was always being set, although it's not mandatory on the facebook api
2. There seems to be an issue with the batch request for POST. The name of the batch request ends up getting appended to the actual body of the request, and this caused the entity name to be set as the batch request name on the api
   eg.
   method: POST,
   body: "name=adname..."
   name: "req-name"

the name of the batch is getting appended to the body like below
body: "name=req-name&method=POST&name=adname"
this is causing the ad name that was published to have it's name as req-name instead of ad name.
Removed the else clause that appends the keyvals of the request object to the body field. I'm not sure if that's required