Force memcached container log to file
Force memcached container log to file

We were relying on the sysconfig options to set the memcached log file,
however, this is not happening, as the redirection is being taken as an
option and ends up being ignored by the memcached command. So instead,
we set the redirection in the container template.

Change-Id: Ic94e3fd7884d518eb9558c53acdc6b294823cd0a
Closes-Bug: #1720183

dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates