fix: vcd logs should use volume dirs

1. This update to the VCD cookbook was inadvertently overwritten
during another merge.

Squashed commit of the following:

commit cee1b26e827eee4c11981c7d5559ec8ac850244f
Author: Rachel McCuistion <rachel@infochimps.com>
Date:   Mon Mar 24 11:59:03 2014 -0500

    use volume_dirs for vcd logs

    Change-Id: I4bd8be2db4740e10dddfa6458727024732f6d4eb

Change-Id: I1e388b6d4ec7eb4b020a6e8e4171101c1a6bd060