Fix accessing to '/' of metadata server without any checks to work

Accessing to '/' of metadata server to get version information should
be allowed without any checks. Due to the wrong comparison condition,
it failed.

Change-Id: Ia8603c321839b959b120af1d018f061f438155c7
Fixes: bug #1192774
Merge pull request #8 from hyunsun/UCLOUDNG-318

Fix accessing to '/' of metadata server without any checks to work