[BUG] Special characters aren't well supported in admin password

[DrissiReda]

You can reproduce it quite simply by creating a cluster with security enabled and using a custom admin password including a character like "*" the cluster won't be able to go up.

Even tried to query the opensearch cluster via http to debug it and encoded the "*" into "%2A" for my cURL and was denied access.

Simply removing this character and using an alphanumeric password works.