Fix: PSU temp sensor don't have upper threshold

PSU Temperatures do not show attribute "UpperThresholdCritical" and
"UpperThresholdNonCritical". Fixing it by adding labelHead parameter
in config file parsing call.

Tested:
verified response by executing command

ipmitool sensor list

Signed-off-by: Joshi, Mansi <mansi.joshi@linux.intel.com>
Change-Id: Ia922a6ae028c240c79ee08e99f819a553b6d8428
diff --git a/src/PSUSensorMain.cpp b/src/PSUSensorMain.cpp
index 3d386e4..a2c3de4 100644
--- a/src/PSUSensorMain.cpp
+++ b/src/PSUSensorMain.cpp
@@ -614,7 +614,8 @@
 
             std::vector<thresholds::Threshold> sensorThresholds;
 
-            if (!parseThresholdsFromConfig(*sensorData, sensorThresholds))
+            if (!parseThresholdsFromConfig(*sensorData, sensorThresholds,
+                                           &labelHead))
             {
                 std::cerr << "error populating thresholds for "
                           << sensorNameSubStr << "\n";