Updated mongo drivers

Squashed commit of the following:

commit 72c340f0716e18ee87ae28984b1a3c4fea903426
Author: Sejal Patel <sejal@inigma.org>
Date:   Tue Jun 25 21:40:10 2013 -0400

    Updated mongo drivers

    Tweaked logging to do printStackTrace before slf4j logging to try and
    help identify the errors caused by slf4j.

commit 5dbb95a46d28880f77ef70cc770ae67c09115d8b
Author: Sejal Patel <sejal@inigma.org>
Date:   Tue Jun 25 15:27:46 2013 -0400

    Attempting to mask a logging error that happens.

    logback appears to be in the middle of eliminating itself when a webapp
    context is reloaded and if the mongo config happens to be in the middle
    of doing something it will error out which will then cause logback to
    get a NPE and then causing the webapp itself to not be unloaded fully
    which leads to a memory leak in the perm space.