Fixing test_volume_boot_pattern when use_floatingip_for_ssh=false

It turns out that the "test_volume_boot_pattern" test doesn't
work if use_floatingip_for_ssh is false. To make this test working
the corresponding changes in the test were done.

Change-Id: I2a007ba46b7b93a8fb7aa70e52bced88383e5cd3
Closes-Bug: #1478482
1 file changed