update test for new default host configuration

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
improvement: configure the default host (pony-express) to be the current host + '/api'

instead of leaving this field empty. it is a sane good default.

Signed-off-by: Dominik Richter <dominik.richter@gmail.com>
Merge pull request #15 from TelekomCloud/default-host

Looks good. Merged.