Multi tenant support in webconsole (#18)

* Initial commit for multi-tenant handling.

* Update muiti tenant code.

* Add Tenant UI.

* Tenant/User API routing.

* Update Tenant APIs.

* Update User APIs.

* Tenant related files.

* Update tenant code.

* Update tenant UI.

* Add User related UI.

* Check email duplication.

* Update check for email and token.

* Remove tenant and change email address fix.

* Prevent to add same UI ID subscription of other tenant.

* Update to sync to the latest code.