All StackLight plugins will switch to use standard HTTP ports for their
UI (Kibana, Grafana and Nagios UI). This change checks whether Grafana
and Nagios use the old (non-standard) ports, if not the tests will use
the standard port numbers.
This avoids breaking the CI after the patches have landed in the
respective plugin repositories.
Co-Authored-By: Simon Pasquier <spasquier@mirantis.com>
Change-Id: Id94cae82b2bea92e049975ccc9e91e4383f52931