The response from creating or updating a User should pass context = edit

[rachelbaker]

When returning the User response from WP_JSON_Users_Controller->create_item() or WP_JSON_Users_Controller->update_item() the edit context should be passed.

This:

$response = $this->get_item( array( 'id' => $user_id ) );

Becomes:

$response = $this->get_item( array( 
    'id' => $user_id,
    'context' => 'edit',
 ) );