Adding channgel for OMCI State feedback

Change-Id: I35728846ab86ca7f6686782e00df7f291a4376e6
diff --git a/omci_common.go b/omci_common.go
index 55c3b02..c878780 100644
--- a/omci_common.go
+++ b/omci_common.go
@@ -60,7 +60,7 @@
 			"IntfId": key.IntfId,
 			"OnuId": key.OnuId,
 			"class": class,
-		}).Warnf("Unimplemeted GetAttributes for ME Class: %v " +
+		}).Tracef("Unimplemeted GetAttributes for ME Class: %v " +
 		    "Filling with zero value for the requested attributes", class)
 		AttributesMask := getAttributeMask(content)
 		pkt[8] = 0x00 // Command Processed Successfully