Support ParameterReq with a populated requests field but an empty param and value field

[notthetup]

fjage defines that a ParameterReq should always have the param field set, and only use the requests field for the 2nd parameter onwards. However, the Fjage.java implementation does support a ParameterReq with all the parameters set in the requests field and an empty param field.

We should update Fjage.jl to follow Fjage.java implementation and accept such messages as well.

For example..

The correct way..

1657162337106|FINE|org.arl.fjage.remote.ConnectionHandler@115:run|tcp:///10.30.0.229:1100//10.30.0.248.59508 <<< {"id":"49916647-d700-49b1-9c5e-e46d2eed19eb","action":"send","message":{"clazz":"org.arl.fjage.param.ParameterReq","data":{"index":-1,"requests":null,"param":"pbscnt","value":1,"msgID":"49916647-d700-49b1-9c5e-e46d2eed19eb","perf":"REQUEST","recipient":"bb","sender":"unetsh#-ly2bin","inReplyTo":null,"sentAt":1657162337054}},"relay":true}

vs the incorrect way (which I propose should be supported)

1657161986677|FINE|org.arl.fjage.remote.ConnectionHandler@100:run|tcp:///10.30.0.229:1100//10.30.0.248.59346 <<< {"action": "send", "relay": true, "message": { "clazz": "org.arl.fjage.param.ParameterReq", "data": {"msgID":"3e0a4748-bfd7-4f95-b3bd-04112524707a","perf":"REQUEST","recipient":"bb","sender":"PythonGW-422a2914-cd67-4b66-a045-b47c03d67716","inReplyTo":null,"index":-1,"requests":[{"param":"pbscnt","value":1}]} }}