Refresh tokens, SAP API, DB Connections, Passwd strength

This PR includes edits to the following docs:

- Refresh tokens
- SAP API tutorial
- DB Connections module list
- Password Strength
this tutorial is depracated. Modify the one in https://github.com/auth0/docs/blob/master/docs/new/server-apis/sap-odata.md. That's shown in the tuto nav.