The 'TestServersBootNovaClient.test_boot_server_using_image_with' tests
in 'novaclient.tests.functional.v2.legacy.test_servers' was failing due
to multiple networks errors. Something has changed here, but I don't
know what and I haven't bisected to figure it out. However, this test
was the only one that wasn't respecting the 'multiple_networks'
attribute we set to detect exactly this issue. Change that, fixing the
test in the process.
Closes-bug: #2077168
Change-Id: If8384aaf138559fe83ba4485049f9a7b45a44e12
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>