Fix PUT/DELETE in s3.query

Was broken in 8ed7c92 during move to requests.

- PUT now uploads data
- Fixes AttributeError

I tested it on 2014.7.0 with [salt.modules.s3.put](http://salt.readthedocs.org/en/latest/ref/modules/all/salt.modules.s3.html#salt.modules.s3.put).