Removing duplicate in_environment scope
Merge pull request #3522 from daviddavis/temp/20131217141032

Removing duplicate in_environment scope
Engine: Adding basic Foreman plugin definition.

This adds the Foreman plugin definition to define a single
navigation menu setup when Katello is installed. Overlapping entities
are scoped by naming and an entire Content menu is added for the
unique entities Katello brings.