Add python3-networking-generic-switch to neutron-server image

This will allow neutron to be configured to use
networking-generic-switch to configure physical switches as an ML2
driver.

This can be merged when RELDEL-4625 is complete.

Jira: OSPRH-15368

Author: steveb

container-images/tcib/base/os/neutron-base/neutron-server/neutron-server.yaml

@@ -7,4 +7,5 @@ tcib_packages:
   - mod_ssl
   - python3-networking-baremetal
   - python3-mod_wsgi
+  - python3-networking-generic-switch
 tcib_user: neutron