Add tests for plugin helpers

- Prevents code analysis from showing functions as unused
- Also address other code analysis issues

libraries/shared/constants/data.go

@@ -18,5 +18,6 @@ package constants
 
 var DataItemLength = 32
 
-// TODO Grab this from DB, since it can change through governance
+// TODO: Move to Plugin
+// TODO: Grab this from DB, since it can change through governance
 var TTL = int64(10800) // 60 * 60 * 3 == 10800 seconds == 3 hours