thresholds: Use correct values for HardShutdown

From the commit messages, these values are supposed to be for
HardShutdown which has the value 4, not 3.

Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>
Change-Id: Ie3ba238f17c9541fc49770aad1c6e412ae5e31be
diff --git a/configurations/FBYV2.json b/configurations/FBYV2.json
index 78671fe..1b7c5ce 100644
--- a/configurations/FBYV2.json
+++ b/configurations/FBYV2.json
@@ -255,7 +255,7 @@
                 {
                     "Direction": "less than",
                     "Name": "lower hardshutdown",
-                    "Severity": 3,
+                    "Severity": 4,
                     "Value": 500
                 },
                 {
@@ -288,7 +288,7 @@
                 {
                     "Direction": "less than",
                     "Name": "lower hardshutdown",
-                    "Severity": 3,
+                    "Severity": 4,
                     "Value": 500
                 },
                 {
@@ -481,7 +481,7 @@
                 {
                     "Direction": "greater than",
                     "Name": "upper non recoverable",
-                    "Severity": 3,
+                    "Severity": 4,
                     "Value": 120
                 }
             ],