VOL-1900 lint warning fixes ro_core

Change-Id: I5ce82f2d188d215ba9620d0923a1101ed4e5e4a8
diff --git a/ro_core/core/common_test.go b/ro_core/core/common_test.go
index 9bef64f..bf7c7c1 100644
--- a/ro_core/core/common_test.go
+++ b/ro_core/core/common_test.go
@@ -30,14 +30,14 @@
 	 * useful.
 	 */
 
-	VOLTHA_LOGLEVEL = log.FatalLevel
+	VolthaLogLevel = log.FatalLevel
 )
 
 // Unit test initialization. This init() function handles all unit tests in
 // the current directory.
 func init() {
 	// Logger must be configured or bad things happen
-	_, err := log.SetDefaultLogger(log.JSON, VOLTHA_LOGLEVEL, log.Fields{"instanceId": 1})
+	_, err := log.SetDefaultLogger(log.JSON, VolthaLogLevel, log.Fields{"instanceID": 1})
 	if err != nil {
 		panic(err)
 	}