Ask for password during upgrade

Upgrades will no longer use password stored in astute.yaml
Now there are two ways to pass admin password to upgrade script:
* new `--password` argument in CLI
* prompt for password when password was not specified by `--password`
When no password was provided error is raised.

Changed where logging is initialized to make CLI tests easier

DocImpact
Implements: blueprint access-control-master-node-improvments

Change-Id: Icc0f952729517fb94ee90ab98b0ee313bc213330
Merge "Ask for password during upgrade"