Changes necessary for PicketBox upgrade performed in wildfly-core 1.0.0.Alpha12

Mainly test Vault case fixies due to changed automatic keystore and secret key creation.
Small changes to VaultTool itself.
Instead of this class doing this via CLI, it might be better to use the TestModule class? There we try to standardise how custom modules are set up in tests. Since this has been a slightly problematic area, it means we have one place to fix problems.