Remove using of UUID field in POST methods of Watcher API

This patch set removes the possibility of using UUID field
in POST methods of Watcher API.

Closes-Bug: #1572625

Change-Id: I88a8aa5346e937e3e9409b55da3316cbe1ed832a

watcher/api/controllers/v1/action.py

@@ -119,7 +119,7 @@ class Action(base.APIBase):
                 self.action_next_uuid = None
                 # raise e
 
-    uuid = types.uuid
+    uuid = wtypes.wsattr(types.uuid, readonly=True)
     """Unique UUID for this action"""
 
     action_plan_uuid = wsme.wsproperty(types.uuid, _get_action_plan_uuid,

watcher/api/controllers/v1/action_plan.py

@@ -143,7 +143,7 @@ class ActionPlan(base.APIBase):
             except exception.ActionNotFound:
                 self._first_action_uuid = None
 
-    uuid = types.uuid
+    uuid = wtypes.wsattr(types.uuid, readonly=True)
     """Unique UUID for this action plan"""
 
     first_action_uuid = wsme.wsproperty(

watcher/api/controllers/v1/audit.py

@@ -51,8 +51,6 @@ from watcher import objects
 
 class AuditPostType(wtypes.Base):
 
-    uuid = wtypes.wsattr(types.uuid, mandatory=False)
-
     audit_template_uuid = wtypes.wsattr(types.uuid, mandatory=True)
 
     type = wtypes.wsattr(wtypes.text, mandatory=True)
@@ -68,7 +66,6 @@ class AuditPostType(wtypes.Base):
             raise exception.AuditTypeNotFound(audit_type=self.type)
 
         return Audit(
-            uuid=self.uuid or utils.generate_uuid(),
             audit_template_id=self.audit_template_uuid,
             type=self.type,
             deadline=self.deadline)

watcher/api/controllers/v1/audit_template.py

@@ -95,7 +95,8 @@ class AuditTemplate(base.APIBase):
     between the internal object model and the API representation of an
     audit template.
     """
-    uuid = types.uuid
+
+    uuid = wtypes.wsattr(types.uuid, readonly=True)
     """Unique UUID for this audit template"""
 
     name = wtypes.text