Fixed locator in attach_volume_1_to_instance_1_on_volumes_lp test to click the correct attach dialog, added assertion to verify correct dialog comes up in the test.
Merge pull request #683 from aliceh/develop

Fixed locator in attach_volume_1_to_instance_1_on_volumes_lp test to click the correct attach dialog, added assertion to verify correct dialog comes up in the test.