https://www.vaultproject.io/docs/auth/token.html#post includes options for an explicit_max_ttl and whether or not the token should be renewable. v3.0.0 of the vault-java-driver does not support these options. It would be great if these could be added.

Acceptance Criteria:
java-vault-driver should support all options for createToken

Suggested Tech Steps:
Update Auth.TokenRequest (