Add "delete the volume-attached server" tests

This patch adds "delete the volume-attached server" tests.

Change-Id: I50f329c9b4f5c7c498d726cd5fa29f32cb8bfe9c
Expand baremetal port coverage

Add missing tests for baremetal port API.

Change-Id: Iccf475ae19b34ff635a47dcbd7754eb19e0970c6
Merge "Expand baremetal port coverage"
Merge "Add "delete the volume-attached server" tests"