Github user aledsage commented on the issue:
https://github.com/apache/brooklyn-server/pull/812
@m4rkmckenna there is a "file-based exteranl config supplier" you can use
for dev (`PropertiesFileExternalConfigSupplier`), and then switch to Vault or
whatever when you're ready.
But I think that @ahgittin's change here is a separate good addition as it
means stock examples can work out-of-the-box without the user having to modify
`brooklyn.cfg` to configure things like that, or to add the desired password to
some file.
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I agree with @drigodwin's suggestion of giving a default in
`visitors-creation-script.sql` so that we don't break other people's examples
that might be referencing that file. For Brooklyn 1.0.0 we can remove the
default, perhaps first warning people on the mailing list.
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