installInfraKvm fix for slow responding environments.

Issue:
- Minions are registered to salt msater however read timeout
  occurs during saltcmdrun check which causes whole job to fail.
  This happens only on slow responding environments.

Fix:
- Add try catch loop to process read timeouts as noncritical fault

Addons:
- Function logic has been changed to get "build minions list loop"
  out of timeout section.
- Timeout call now has expilit unit set: "MINUTES"

Change-Id: Ia3f6ea027594e8427778d877d36f48d9b466ae80
2 files changed