List command for new CLI

[Conjur-oss]

h2. Overview

We want to allow users to get information about group memberships, permissions on resources and etc..

h2. The customer need

As a Conjur user
I would like to use the Conjur cli
In order to understand which roles and members have what privileges on Conjur's resources.

 
h2. DOD

• Implement the UI command and subcommands in Conjur Python CLI in all 3 platforms
•  Demo the flow described above
•  Automatic integration tests written according to a test plan and passed successfully
•  Fill in the user messages - link to a page with all user messages for CLI saved and reviewed.
•  Fill in the logs and place here a link to the logs files - link to a page with all logs for CLI saved and reviewed.
•  Logs were reviewed by TW and PO
•  Are there new Audits to this feature? If so please document them and provide here a link (N/A)