Change interval units to milliseconds

Allow the monitoring intervals to be specified in
milliseconds instead of seconds in order to handle
polling intervals less than a second.

Change-Id: I3ef078df29ef2866920f00103710b02dbde6fcb2
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/power-sequencer/pgood_monitor.hpp b/power-sequencer/pgood_monitor.hpp
index 199efe8..9cbda60 100644
--- a/power-sequencer/pgood_monitor.hpp
+++ b/power-sequencer/pgood_monitor.hpp
@@ -46,7 +46,7 @@
         PGOODMonitor(std::unique_ptr<witherspoon::power::Device>&& d,
                 sdbusplus::bus::bus& b,
                 witherspoon::power::event::Event& e,
-                std::chrono::seconds& t) :
+                std::chrono::milliseconds& t) :
             DeviceMonitor(std::move(d), e, t),
             bus(b)
         {