gbproxy: Fix config file typo

In If1220852785853f8a5d8de183d5053ddd6ccb958 I introudced a config
file typo in the GBProxy_Tests.cfg. Let's fix that

Change-Id: I78b6307d16abd37e77e66e511f91a8dda902b58d
diff --git a/gbproxy/GBProxy_Tests.cfg b/gbproxy/GBProxy_Tests.cfg
index a9e209c..638946c 100644
--- a/gbproxy/GBProxy_Tests.cfg
+++ b/gbproxy/GBProxy_Tests.cfg
@@ -41,7 +41,7 @@
 						local_ip := "127.0.0.1",
 						remote_ip := "127.0.0.1"
 					}
-				},
+				}
 			}
 		}
 	},