added symlink to use current mongo driver.
added symlink to use current mongo driver.

jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud,jasonwee/videoOnCloud