Refactored Watcher objects to use OVO

In this changeset, I modified all existing Watcher objects to now
rely on oslo.versionedobjects as a base.

Change-Id: I3c9b1ca6da529d128743b99020350f28926ea1a2
Partially-Implements: blueprint watcher-versioned-objects

watcher/api/controllers/v1/action.py

@@ -379,7 +379,7 @@ class ActionsController(rest.RestController):
         action_dict = action.as_dict()
         context = pecan.request.context
         new_action = objects.Action(context, **action_dict)
-        new_action.create(context)
+        new_action.create()
 
         # Set the HTTP Location Header
         pecan.response.location = link.build_url('actions', new_action.uuid)

watcher/api/controllers/v1/audit.py

@@ -519,7 +519,7 @@ class AuditsController(rest.RestController):
         audit_dict = audit.as_dict()
 
         new_audit = objects.Audit(context, **audit_dict)
-        new_audit.create(context)
+        new_audit.create()
 
         # Set the HTTP Location Header
         pecan.response.location = link.build_url('audits', new_audit.uuid)

watcher/api/controllers/v1/audit_template.py

@@ -568,11 +568,11 @@ class AuditTemplatesController(rest.RestController):
         audit_template_dict = audit_template.as_dict()
         new_audit_template = objects.AuditTemplate(context,
                                                    **audit_template_dict)
-        new_audit_template.create(context)
+        new_audit_template.create()
 
         # Set the HTTP Location Header
-        pecan.response.location = link.build_url('audit_templates',
-                                                 new_audit_template.uuid)
+        pecan.response.location = link.build_url(
+            'audit_templates', new_audit_template.uuid)
         return AuditTemplate.convert_with_links(new_audit_template)
 
     @wsme.validate(types.uuid, [AuditTemplatePatchType])