Updated openstack/openstack
Project: openstack/python-cinderclient  e8a0e6abdf29a85516474aadffdce4400e74dce9
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Fix inappropriate comment for set_metadata

Fix inappropriate comment for the param of set_metadata

Change-Id: I01495f59b11ed88389b0e0f2f5fb34289f64dbac
Closes-Bug: 1254951