Token Pool namespace issues after dynamic config reload

Steps to reproduce:

- Enable dynamic config reload
- Add a namespace named space0 and save the config file. Ensure FireFly fully starts the namespace.
- Remove the namespace from the config file. Ensure FireFly fully stops the namesapce
- Add a new namespace named space1 and save the config file. Ensure FireFly fully starts the namespace.
- Attempt to create a token pool in space1

See that the token pool create event failed, and the error message is `FF10446: Namespace 'space0' is not started`