CA-136173: Getting several notifications for one user-level action (e.g. Updating network operation creates 4 entries in the Notifications/Events view)

- Set the pool details in the action to allow proper filtering by location on the Events page
- Also, when possible, set the Host property: when setting the SR in the action, we also set the Host to SR.Home

Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>