fix refstack.conf.sample typo
fix refstack.conf.sample typo

A modified version of the refstack.conf file was pushed (and
merged) as part of the original patch. This reverts the samplefile
back to the oslo config generated version.

Change-Id: I8e29f5e119c83ee1e55db2281abd78bd0f3be0a1

openstack/refstack,stackforge/refstack,openstack/refstack,openstack/refstack,stackforge/refstack,openstack/refstack,stackforge/refstack,stackforge/refstack