Missing .json() methods

[Brutalbeard]

Noticed a lot of the methods in the SDK which should be returning a json object, were still returning raw data.

Copied the correct thenable into the appropriate methods.

[Brutalbeard]

@kirill-konshin - when you get a minute.

[kirill-konshin]

wipe-wipe-wipe

There are *Raw method versions, I think we should alter the code to use raw then .json() instead of current duplication.

Json can be added only in case the returned response is always JSON, not multipart, for example.

There's an if for that in code generator: {% if op.responseType != 'any' and op.responseType != 'void' %}. Have you used code generator to do the fix?