It should be possible for user credentials to be updated at runtime if the user secret is modified.

To implement this we need to update the .properties files on each of the server pod instances. For each pod we need todo:

1. Execute CLI user ls in order to obtain the currently defined users
2. Generate a batch file with the required user create and user rm commands, based upon the updated secret and the existing users obtained in 1.
3. Execute CLI batch

We need to execute all 3 stages on each of the pods to ensure that if any failed reconciliation attempts result in inconsistencies between pod's .properties files, the update is still able to proceed.