Overwork Services/Discovery (#725)

* Update homeassistant.py

* Update validate.py

* Update exceptions.py

* Update services.py

* Update discovery.py

* fix gitignore

* Fix handling for discovery

* use object in ref

* lock down discovery API

* fix api

* Design

* Fix API

* fix lint

* fix

* Fix security layer

* add provide layer

* fix access

* change rating

* fix rights

* Fix API error handling

* raise error

* fix rights

* api

* fix handling

* fix

* debug

* debug json

* Fix validator

* fix error

* new url

* fix schema

hassio/const.py

@@ -74,6 +74,7 @@ ATTR_TYPE = 'type'
 ATTR_SOURCE = 'source'
 ATTR_FEATURES = 'features'
 ATTR_ADDONS = 'addons'
+ATTR_PROVIDERS = 'providers'
 ATTR_VERSION = 'version'
 ATTR_VERSION_LATEST = 'version_latest'
 ATTR_AUTO_UART = 'auto_uart'
@@ -107,8 +108,6 @@ ATTR_MAINTAINER = 'maintainer'
 ATTR_PASSWORD = 'password'
 ATTR_TOTP = 'totp'
 ATTR_INITIALIZE = 'initialize'
-ATTR_SESSION = 'session'
-ATTR_SESSIONS = 'sessions'
 ATTR_LOCATON = 'location'
 ATTR_BUILD = 'build'
 ATTR_DEVICES = 'devices'
@@ -154,7 +153,7 @@ ATTR_MEMORY_LIMIT = 'memory_limit'
 ATTR_MEMORY_USAGE = 'memory_usage'
 ATTR_BLK_READ = 'blk_read'
 ATTR_BLK_WRITE = 'blk_write'
-ATTR_PROVIDER = 'provider'
+ATTR_ADDON = 'addon'
 ATTR_AVAILABLE = 'available'
 ATTR_HOST = 'host'
 ATTR_USERNAME = 'username'
@@ -163,8 +162,8 @@ ATTR_DISCOVERY = 'discovery'
 ATTR_PLATFORM = 'platform'
 ATTR_COMPONENT = 'component'
 ATTR_CONFIG = 'config'
-ATTR_DISCOVERY_ID = 'discovery_id'
 ATTR_SERVICES = 'services'
+ATTR_SERVICE = 'service'
 ATTR_DISCOVERY = 'discovery'
 ATTR_PROTECTED = 'protected'
 ATTR_CRYPTO = 'crypto'
@@ -188,6 +187,9 @@ ATTR_HASSIO_ROLE = 'hassio_role'
 ATTR_SUPERVISOR = 'supervisor'
 
 SERVICE_MQTT = 'mqtt'
+PROVIDE_SERVICE = 'provide'
+NEED_SERVICE = 'need'
+WANT_SERVICE = 'want'
 
 STARTUP_INITIALIZE = 'initialize'
 STARTUP_SYSTEM = 'system'