This change implements the log directory link checking. This will ensure
the role is able to handle instances where memcached is deployed outside
of a container using the "is_metal: true" property from OSA.
Change-Id: Ia5e38dd1fda9f7fa5876e0a2824c88d0fa3d2b8d
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>