add/replace to params in loc-id-router constraint
add/replace to params in loc-id-router constraint

Instead of completely replacing the params with
a new set of values, we keep the old keys and
values but overwrite them where necessary.

ontohub/ontohub,ontohub/ontohub,ontohub/ontohub,ontohub/ontohub,ontohub/ontohub,ontohub/ontohub