Add support for Predis

[plfort]

[mmoreram]

Thank you very much!

But there's a problem here, so I'm going to "drop" this bundle in favor of RSQueue Organization, splitted by bundle and component.

Take a look, and we can add this feature there :)

How it sounds?

[plfort]

Oh I didn't see this organization, ok for me I will create two separate pull requests

[mmoreram]

@plfort Great ^^

[mmoreram]

@plfort One of the next things I will change in the RSQueue Organization's Bundle is the usage of the [http://github.com/mmoreram/BaseBundle] for Bundle features and testing, but after some extra work needed in both the bundle and the components, I would like to make releases there (hopefuly for PHP ^7.1 and Symfony ^3.2)