ability to specify subject as namespace owner to manage other subjects in a namespace.

Enhancement:

Ability to mention a subject as a owner when provisioning namesapce.

Currently only the administrator who is having access to openwhisk boot instance (wskadmin cmd) able to manage users and namespaces. Enhancement is to configure a user as owner of namesapce who can further configure/provision other users in his team to deploy and manage functions.
It is also helpful further to expose new PUT APIs for namespace to provision users for owner in owned namespace as currently only Get All Namespace and Get Namespace is available.

For example, we are creating namespaces per team and want to have functionality for one or more team members to add other team members in that namesapce.

Please let me know if that is currently achievable which I am missing and has any security impacts.

* This will help in developing web applications to manage namespaces remotely leveraging namesapce PUT APIs.
* Further in future, can be think of making tenant based approach to manage namespaces.

Please let me know your suggestions.