Update JSON tag to follow camel case

JSON tag for post fail action has been modified to follow camel case.
Worker code has been modified accordingly.

Change-Id: I20960a2bdac13cca9f426d04e37247c5ebb62ddb
Signed-off-by: Sunny Srivastava <sunnsr25@in.ibm.com>
diff --git a/configuration/ibm/50003000.json b/configuration/ibm/50003000.json
index 36f0cde..1d3f209 100644
--- a/configuration/ibm/50003000.json
+++ b/configuration/ibm/50003000.json
@@ -3025,7 +3025,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card1",
@@ -3133,7 +3133,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card2",
@@ -3243,7 +3243,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card3",
@@ -3353,7 +3353,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card4",
@@ -3463,7 +3463,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card5",
@@ -3562,7 +3562,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card6",
@@ -3637,7 +3637,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card7",
@@ -3747,7 +3747,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card8",
@@ -3842,7 +3842,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card9",
@@ -3917,7 +3917,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card10",
@@ -4027,7 +4027,7 @@
                         }
                     }
                 },
-                "PostFailAction": {
+                "postFailAction": {
                     "collection": {
                         "setGpio": {
                             "pin": "presence-cable-card11",