We now support a selected subset of push/pull/wrapped RoleId and SecretId combinations using AppRoleAuthentication:
* Provided RoleId/SecretId
* Provided RoleId without SecretId
* Provided RoleId, Pull SecretId
* Pull RoleId, provided SecretId
* Full pull mode
* Wrapped
* Wrapped RoleId, provided SecretId
* Provided RoleId, wrapped SecretId
The particular mode is derived from role-id, secret-id, role (name) and token properties beneath spring.cloud.vault.*.
Closes gh-174.