JRA-26194: usernames in Favourite Filters should be stored lower case only. Update the storage. On the 5.0.x branch
this was UT_728. We introduced it on the branch and need to run it again in case people go from 5.0.2 -> 5.1
rather that 5.0.3+ -> 5.1.
Return the Upgrade task id of another upgrade task that must be run prior to this task.