py310: Add required-projects list to py310 job
py310: Add required-projects list to py310 job

For unit test jobs neutworking-bagpipe needs horizon, networking-bgpvpn
and networking-sfc, so let's add these to py310 job also.

Change-Id: Ia28bd3e4aef40cd490e4a98283b1b2507350f56f

openstack/networking-bagpipe,openstack/networking-bagpipe