Reports enabled-root for restored instance

Reasons:
- This condition got missed in one of the earlier patchsets.
- When a root-enabled instance's backup is restored, it does not
  reports to service database that root was enabled for
  restored instance.

Changes:
- report_root method added in conductor.
- Reports, if root is enabled for restored instance, through conductor.

Change-Id: I186398e6651421cecb7169e4eec1d6a8a166ee97
Closes-Bug: #1277745
Merge "Reports enabled-root for restored instance"