Resque module is not including helpers.

This is the first step towards getting rid of the
Helpers module.

This is backport of 99a03b50d4211851dbce88caafa8f42549345858
Remove Helpers from Job class.

All of these methods will obviously need to be cleaned up
later, right now we're just killing Helpers.

This is a backport of 93eca9a7b0b9a899d37347a0dcd6c4ca9039fc6d
Remove duplicate method definition for #redis

This is a backport of 2e984a99a885aad7acee4cbb82e3f61edc5e2812