ManagerRefresh::Inventory::Parser is the new base class for
refresh.

Modify Base target class to align with Amazon usecase

Modify Collector base class to align with Amazon usecase

Modify Inventory base class to align with Amazon usecase

Target initialize is taking a collector object as a parameter

Modify Ansible Target to use the new target and manager methods

Ansible tower enhance target IC definitions

Unify Target and Collector interface

Allow to overwrite aninsible IC defaults

Rename Target to Persister under Inventory

Dynamic access of collections with Rails like method cache,
first pass goes through methods missing and looks into
collections hash by creating a getter metho. So second+
pass is much faster.

Renames in Persister according to review

Explicitly define a delete method instead of auto-magic, the
default IC definitions have delete_method defined, if it differs
from a default :destroy.