JCLOUDS-246: Joined Hosted and Private Chef apis

Joined Hosted and Private Chef apis and renamed the provider to Enterprise Chef. The following changes have been applied:

* Joined Hosted and Private Chef in a single EnterpriseChef api.
* Changed all references to Hosted or Private to enterprise Chef.
* Renamed packages to `enterprisechef`.
* Renamed artifactId to `enterprisechef`.
* Changed provider id to `enterprisechef`.
* Removed the `labs` folder and made `enterprisechef` a provider, as there have been many releases and it is stable and tested.