Just updating usage/usage_records mongo collection with TrackUsageOp is not enough. These two addtional ops are missings:
ChangeAddtlFsGbOp --> Update group overrides for the group instance
SetAddtlFsGbOp --> Update gear on the node with new addtl fs

We should reuse calculate_change_max_untracked_storage_ops() in application.rb/calculate_ops(). Then we will have code for handling additional storage in one place and that helps in case of future bug fixes.