analysis: make statistics view use a more legible format

analysis: make statistics view use a more legible format

statistics will now display times using units and 3 significant
decimals as opposed to the way they were displayed before (unitless
left-aligned nanoseconds)

Change-Id: I35cfeeb7d038ac2b9f52f3648c3e4337a6ec279c
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/63787
Reviewed-by: Hudson CI
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>