Added missing auth url to the lwr for entity
If the chef_gem resource fails always fall back to system level ruby
Make credentials configurable

* Anywhere the encrypted databag was used now has a configurable node attribute to find the
data bag. Will fallback to the old default if not specified.
Updated per feedback

* Changed the name of the databag to be databag_name and databag_item
* Set defaults in the attributes to be overriden
Add missing resource attributes and specify notification plan id as required
Restore the NameError exception for system ruby install
Merge pull request #21 from riltsken/make_credentials_configurable

Make credentials configurable