Improved feedback for domU install on XS

Change-Id: I5b9d07493eb334169fb2643047a014f56ee265fa
Improve millisecond logging

Always display 3 digits for milliseconds (appends 0s)
Based on I3f1461839258be0723e2d3616ec225a830d13029

Change-Id: I48b3f3781b4d34ed6a5fb9e4e78cee919afda6c1
Merge "Improved feedback for domU install on XS"
Merge "Improve millisecond logging"