Modify oxd apis to make it compatible with Auth0 sdks

[duttarnab]

Create an APIs that are compatible with Auth0’s authentication API.
https://auth0.com/docs/api/authentication

Expected outcomes:
This could be a proprietary feature for Gluu Cloud.

If we could then use Auth0’s various SDKs and Docs for the Gluu Server

This new API server could be a commercial Plugin

[duttarnab]

I think that oxauth endpoints are already compatible with Auth0 sdks, except few minor changes required (like the difference in endpoint name). I have tested with Auth0 react sdk and found it working directly with gluu server (without oxd). I will do furthur testing and confirm.

oxauth endpoints: https://gluu.org/swagger-ui/?url=https://raw.githubusercontent.com/GluuFederation/oxAuth/master/docs/oxAuthSwagger.yaml#/User%20Info/get-userinfo

Auth0 sdks: https://auth0.com/docs/libraries

[duttarnab]

Duplicate of #462