Use unique complex names per test

Use unique complex names per test

- AAI only allows deletion of objects when there is no other object
  referencing it
- multiple tests use the same complex name `lannion`
- tests fail in cleanup step because the complex cannot be removed
  since it is still in use by other tests
- use unique complex names to isolate the tests and resolve the
  cleanup issue

Issue-ID: INT-2357
Change-Id: Icabad09ce1965147201253503bbbf9081402c692
Signed-off-by: Fiete Ostkamp <fiete.ostkamp@telekom.de>