vault-worker potentially leaks tokens

[bnevis-i]

vault-worker (core/main.go) potentially leaks tokens. This is because the logic creates new kong and admin tokens after initing or unsealing the vault. Each of these tokens is persistently stored in the Vault database, thus, a new pair of tokens is created each time vault-worker runs. Over a long period of time this will result in large numbers of dead active tokens in the database.