Since the grand-parent commit, if possible, the gNBs synchronize on a
slot-level boundary. Some configuration files/command line overrides
left the same SSB position for two DUs in RFsim-based handover
scenarios, which then makes that the UE cannot decode the SSB.
This commit changes the positions such that this is possible again. In
the F1 HO docker-compose
(ci-scripts/yaml_files/5g_f1_rfsimulator/docker-compose.yaml), we set it
to 2 to send only one SSB (not 2 with bitmap 3).
Robert Schmidt
4e9a853696