With change Ic79815972e654a8bfe2775f57c68cfa0bf115e2f, we started
using getaddrinfo method from socket lib to fetch the system
IP address (v4 or v6) and pass it to os-brick.
The test works for most systems since a valid IP is returned but
for some deployments, it fails with the following error.
raise socket.gaierror(socket.EAI_NONAME, 'No address found')
In any case, it is a good practice to mock it in tests.
This patch mocks getaddrinfo in the current cinder store tests.
Change-Id: Ib03fefbb6034a7e7d2ff1e16430d28962c2ca355
f40ac40c2c