Removed the node attribute "developer_mode"

This should only be set as an environment variable,
set within Chef.
forced evaluation of the Node Attribute.

"developer_mode" should only be used if it is true.
updated for syntax /is/==/
fix foodcritic errors for cloudnull
Merge branch 'foodcritic_cloudnull' of https://github.com/rackerjoe/keystone into DE199-folsom
Merge pull request #119 from cloudnull/DE199-folsom

DE199 folsom