bump(github.com/goraft/raft): 6bf34b9

Move from coreos/raft to goraft/raft and update to latest.

third_party/github.com/goraft/raft/z_test.go

@@ -0,0 +1,13 @@
+package raft
+
+/*
+import (
+	"testing"
+	"time"
+)
+
+func TestGC(t *testing.T) {
+	<-time.After(500 * time.Millisecond)
+	panic("Oh god no!")
+}
+*/