'azure sb namespace show' does not include connection string details

[laurencee]

CLI Version: 0.10.7 OS Type: Win Installation via: npm

Mode: ASM

Environment: AzureCloud

Description: 'azure sb namespace show' command does not include connection string details as detailed in the msdocs: https://docs.microsoft.com/en-us/azure/virtual-machines-command-line-tools#commands-to-manage-service-bus

This prevents me from being able to programmatically spin up an environment using json templates and updating relevant application variables with the correct connection string.

Steps to reproduce:

1. Create an azure service bus
2. Then run azure sb namespace show ...