Feature/master/pe 945 add class containment path to resource status


    (PE-945) Add containment path to report resource_status
    
    This commit adds a new attribute the `Puppet::Resource::Status`
    class, called `containment_path`.  The value is an array of
    strings that indicates the types and classes that the resource
    is contained within.  (The format is the same as what we show
    in the log messages during an agent run.)
    
    This data will be used by PuppetDB to allow queries by class,
    which will return resources that are contained within the
    specified class.