Add unit to health sensor

Added unit property in dbus

Tested:
Verfied by running on target and querying unit peoperty from dbus
busctl get-property xyz.openbmc_project.HealthMon
/xyz/openbmc_project/sensors/utilization/Memory
xyz.openbmc_project.Sensor.Value Unit

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Change-Id: I3a4fe71e83992688cdcdd2bdff9c2037558cf12d
diff --git a/healthMonitor.cpp b/healthMonitor.cpp
index f7ca6ce..a04ff37 100644
--- a/healthMonitor.cpp
+++ b/healthMonitor.cpp
@@ -162,11 +162,15 @@
         return;
     }
 
-    /* Initialize value queue with initail sensor reading */
+    /* Initialize value queue with initial sensor reading */
     for (int i = 0; i < sensorConfig.windowSize; i++)
     {
         valQueue.push_back(value);
     }
+
+    /* Initialize unit value (Percent) for utilization sensor */
+    ValueIface::unit(ValueIface::Unit::Percent);
+
     setSensorValueToDbus(value);
 
     /* Start the timer for reading sensor data at regular interval */