Updated openstack/openstack
Project: openstack/cinder  110f3bcd0991fc5e57dc1c6031197436b937eaaf

Fix variable name in api/v<n>/snapshot.py

Noticed in a recent bug fix that the when the show
method was copy/pasted at some point the variable name
vol was not updated.

Silly annoyance, but thought I'd go ahead and replace vol
with snapshot to make the variable name reflect what's
actually in use here.

Change-Id: I137ecc4987258450e93195cfed5e128063b92914