Add missing 'command' and 'configuration' object into
command object list, add command, module, host commands
describe in command-objects, and add 'mask' and 'unmask'
options in configuration command details, fix some format
issues by the way.
Change-Id: Iea80c7b1e413e02e49b9090b9d3cb9c59aab4c38
Create a `configuration show` command that displays the current
configuration of the CLI. Different configurations can be
displayed using options such as --os-cloud. Passwords and
tokens are redacted by default unless the --unmask
option is specified.
Closes-Bug: #1476729
Change-Id: I0792365d0c5fa526cd09c0ed88c6bb1e2cb813a7