PR description

Add the Additional Network Type Geneve
see: https://docs.openstack.org/neutron/rocky/admin/intro-overlay-protocols.html
and
Add The Volume state Reserved.
When a server is in state shelfed the volumes are in state reserved
see: https://bugzilla.redhat.com/show_bug.cgi?id=1815594
...

Submitter checklist

Make sure that following is addressed to make the PR easier to process:

• If applicable, changes are covered by either a unit or a functional test.
  -not availible
• If applicable, changes ware verified manually against an OpenStack instance.
  no release since maybe 2 jears we just add this to openstack4j but will build an own solution
• If the change is API related, the PR description links to OpenStack API documentation of that particular endpoint/request (https://docs.openstack.org/api-quick-start/#current-api-versions).
• If the change concerns particular OpenStack service, its name is used as a PR name prefix (ex.: "Neutron: Add floatingIp port forwardings service").
• If the PR closes existing GitHub issue, PR name have prefix: Fix #NNN: .