The upgrade procedure failed to connect to the database to complete the upgrade so we ran the foglight_db_upgrade script as documented.
This also failed with "ORA-12505, TNS:listener does not currently know of SID given in connect descriptor"
1) Edit the $FGLHOME/server/default/conf/oracle-ds.xml and enter your correct RAC connection parameters which existed before the upgrade.
2) Start the FMS with the DB upgrade switch equating to true.
ie. cd $FGLHOME/bin
UNIX: fms -d -Dfoglight.database.upgrade=true
WINDOWS: fms -Dfoglight.database.upgrade=true