Upgrade the User & Group APIs to Version 2

[dushimsam]

Upgrade the /users & /groups APIs to Version 2

In accordance with our new policy documented here, we want to enhance our REST APIs to Version 2 migrating all /users APIs. The setup for the Version 2 is already in place.

1. /users, POST

• Change these fields to camelCase: copyright_email_author, user_pass

2. /users & /users/{id}, GET

• Change these fields to camelCase: copyright_email_author

3. /users/{id}, PUT

• Change these fields to camelCase: copyright_email_author, user_pass

4. /users/self, GET

• Change these fields to camelCase: copyright_email_author, default_group

5. /users/tokens, POST

• Change these fields in requestBody to camelCase: token_name, token_scope, token_expire

6. /users/tokens/{type}, GET

• Change these fields to camelCase: active_tokens, token_name, token_expire

7. /groups, POST

• Move name from the headers to query parameters.

8. /groups/{id}/members, GET

• Change these fields to camelCase: copyright_email_author, group_perm

Cc: @GMishx @shaheemazmalmmd

[dvjsharma]

I'll look into this