* Model->Role->Module.
Yet to import modules/exos_facts.py
* exos_facts refactor
* future-import and metaclass
* Fix unit tests
* Fix openconfig-lldp word and send_request API from Httpapi class
idempotent, json.dumps in base class, send_requests from base exos class
* action file for exos_lldp_global
* Add intergration tests for exos_lldp_global
* Test data field of the request
