We now support optional prefixing of property names. Property names coming from Vault are exposed with a prefixed name through VaultPropertySource.
@VaultPropertySource(value = "mysql/creds/readonly", propertyNamePrefix = "database.")
static class Configuration{}
will expose all keys under "mysql/creds/readonly" prefixed with "database." that lead properties known as "database.username" and "database.password".
Closes gh-48.