Fix error message in Share Networks API
Fix error message in Share Networks API

Remove back-ticks in the user facing string.
Add translation marker.
Capitalize release name.

TrivialFix

Change-Id: Ifdeb66ce95bf98d3378ac95c8e0bc25140166885

bswartz/manila,openstack/manila,openstack/manila,vponomaryov/manila,vponomaryov/manila,bswartz/manila