Mongo code changes

Changed attributes for new volume attachment and ulimits.
Changed definitions for ulimits and /journal dir permissions.
Changed libraries to correctly reconfigure replicasets dynamically.
Changed metadata to include new version and include aws_ebs_disk recipe.
Changed default recipe to include aws_ebs_disk, template for ulimits, keep alive time and journal link.
Added limits.conf.erb.
Changed template config erb to remove bind ip.
Change init template to wait longer when killing process.