Optimize template 2 (#3521)

* Enforce compiling templates

* Refactor templates

* Add template validator to Logbook service

* Some more fixes

* Lint

* Allow easy skipping of rfxtrx tests

* Fix template bug in AND & OR conditions

* add entities extractor

Conflicts:
	tests/helpers/test_template.py

* fix unittest

* Convert template to be async

* Fix Farcy

* Lint fix

* Limit template updates to related entities

* Make template automation async

homeassistant/components/sensor/arest.py

@@ -52,9 +52,11 @@ def setup_platform(hass, config, add_devices, discovery_info=None):
         if value_template is None:
             return lambda value: value
 
+        value_template = template.Template(value_template, hass)
+
         def _render(value):
             try:
-                return template.render(hass, value_template, {'value': value})
+                return value_template.render({'value': value})
             except TemplateError:
                 _LOGGER.exception('Error parsing value')
                 return value