health_metric_config: add storage tmp

Add the Storage_TMP to metric json config.

Change-Id: Ie32a71c936b974ebaaeb625f7018d4b875f831a2
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
diff --git a/health_metric_config.cpp b/health_metric_config.cpp
index 2c0c78c..be8ebb7 100644
--- a/health_metric_config.cpp
+++ b/health_metric_config.cpp
@@ -43,7 +43,8 @@
     {"Memory_Available", SubType::memoryAvailable},
     {"Memory_Shared", SubType::memoryShared},
     {"Memory_Buffered_And_Cached", SubType::memoryBufferedAndCached},
-    {"Storage_RW", SubType::storageReadWrite}};
+    {"Storage_RW", SubType::storageReadWrite},
+    {"Storage_TMP", SubType::storageReadWrite}};
 
 /** Deserialize a Threshold from JSON. */
 void from_json(const json& j, Threshold& self)
@@ -247,6 +248,18 @@
                 "Target": ""
             }
         }
+    },
+    "Storage_TMP": {
+        "Path": "/tmp",
+        "Frequency": 1,
+        "Window_size": 120,
+        "Threshold": {
+            "Critical": {
+                "Value": 85.0,
+                "Log": true,
+                "Target": ""
+            }
+        }
     }
 })"_json;