Support for HMC/console-level command group

[andy-maier]

Overview

Add support for an HMC/console-level command group and commands.

Proposal

New console command group and commands:

• console show - Show details of the HMC
• console get-audit-log - Get the audit log entries of the HMC as a log file
• console get-security-log - Get the security log entries of the HMC as a log file
• console list-unmanaged-cpcs - List the unmanaged CPCs of the HMC - DONE in PR Support for unmanaged CPCs #374
• console make-primary - Change the role of the HMC to become the primary HMC
• console restart - Restart the HMC
• console shutdown - Shut down and power off the HMC