Bugs in Data Bag Item Resource / Object

On Ridley:master.

`conn.data_bag.find("my_data_bag").item.find("my_item").decrypt`

* Undefined method 'data_bag_secret'

`conn.data_bag.find("my_data_bag").item.find("my_item").decrypt_value("foo")`
* OpenSSL::Cipher::CipherError: wrong final block length