add db/auth test

tests/db_test.go

@@ -0,0 +1,14 @@
+package tests
+
+import (
+	"testing"
+	"github.com/leanote/leanote/app/db"
+//	. "github.com/leanote/leanote/app/lea"
+//	"github.com/leanote/leanote/app/service"
+//	"gopkg.in/mgo.v2"
+//	"fmt"
+)
+
+func TestDBConnect(t *testing.T) {
+    db.Init("mongodb://localhost:27017/leanote", "leanote")
+}