Add a new Criterion to the existing list of cluster criteria for the command identified by id.
The priority is the place in the list this new criterion should be placed.
A value of 0 indicates it should be placed at the front of the list with the highest possible priority.
1 would be second in the list etc.
If priority is > the current size of the cluster criteria list this new criterion will be placed at the end as the lowest priority item.
Priority must be >= 0.