Merge "template syntax validation - adding description"

vitrage/evaluator/template_fields.py

@@ -26,6 +26,7 @@ class TemplateFields(object):
     ACTION_TYPE = 'action_type'
     CATEGORY = 'category'
     CONDITION = 'condition'
+    DESCRIPTION = 'description'
     ENTITIES = 'entities'
     ENTITY = 'entity'
     ID = 'id'

vitrage/evaluator/template_syntax_validator.py

@@ -64,7 +64,8 @@ def validate_template_sections(template_conf):
 def validate_metadata_section(metadata):
 
     schema = Schema({
-        Required(TemplateFields.ID): Any(str, six.text_type)
+        Required(TemplateFields.ID): Any(str, six.text_type),
+        TemplateFields.DESCRIPTION: Any(str, six.text_type)
     })
 
     error_msg = SCHEMA_CONTENT_ERROR % (

vitrage/tests/resources/templates/general/basic.yaml

@@ -1,5 +1,6 @@
 metadata:
  id: basic_template
+ description: basic template for general tests
 definitions:
  entities:
   - entity: