Recursively chown the executor work directory after extracting
resources.

From: Ben Mahler <benjamin.mahler@gmail.com>
Review: https://reviews.apache.org/r/8947

git-svn-id: https://svn.apache.org/repos/asf/incubator/mesos/trunk@1434967 13f79535-47bb-0310-9956-ffa450edef68