NamedQuery parameters should be optional

[donaldgray]

There has been a change in behaviour between how Deliverator and Protagonist handles NamedQuery parameters.

Deliverator allows you to specify multiple parameters in an NQ definition and only supply some of them, the others would effectively be ignored. However, this was tightened up in Protagonist and parameters became required - e.g. if an NQ is configured with 3 p* values but was only given 1 it will return a 400 exception, logging an error of Not enough query arguments to satisfy template element parameter.

Protagonist should allow missing parameters, a follow up ticket with introduce a new syntax to specify required parameters.