ExternalCDR with time string as Usage for *voice ToR, diameter test fixes

data/conf/samples/dmtagent/cgrates.json

@@ -4,6 +4,10 @@
 // Used for cgradmin
 // Starts rater, scheduler
 
+"general": {
+	"log_level": 7,
+},
+
 "listen": {
 	"rpc_json": ":2012",				// RPC JSON listening address
 	"rpc_gob": ":2013",					// RPC GOB listening address