Change wspoon power sequencer units to ms

Change the units of time that the witherspoon-pseq-monitor
application takes from seconds to milliseconds.

An upcoming commit will reduce one of the values below
one second.

Change-Id: I7f65f008c3dd8e888e416a1ec240e2955d0b00de
Signed-off-by: Matt Spinler <spinler@us.ibm.com>