update for APS-U era PVs

[prjemian]

With the new storage ring from APS-U, verify the devices that connect with the information from the storage ring and beam line front ends. Include insertion devices. Check these files:

• aps_bss_user.py #969
• aps_cycle.py #970
• aps_cycle_info.yml #971
• aps_machine.py #972
• aps_undulator.py #973

[prjemian]

This issue created issues for all the relevant topics. Only #969 (update aps_bss_user support) remains. Closing this issue.