It is possible to create broadcast group using non-existent connectors

It is possible to create broadcast group using non-existent connectors. It seems that validation is missing for add operation. This affects both CLI and Amin console, thus I suppose that problem is in underlying Management API.

Example:

1. Creation of new group with non-existent connectors "ab" and "ba" will succeed

[standalone@localhost:9999 /] /subsystem=messaging/hornetq-server=default/broadcast-group=foo:add(socket-binding=default, connectors=[ab,ba])
{
"outcome" => "success",
"response-headers" =>

{ "operation-requires-reload" => true, "process-state" => "reload-required" }

}

2. However if we try to change the value of connectors attribute to the very same value it will fail

/subsystem=messaging/hornetq-server=default/broadcast-group=foo:write-attribute(name=connectors,value=[ab,bc])
{
"outcome" => "failed",
"failure-description" => "JBAS011680: The broadcast group 'foo' defines reference to nonexistent connector 'ab'. Available connectors '[netty, in-vm, netty-throughput]'.",
"rolled-back" => true,
"response-headers" =>

{"process-state" => "reload-required"}

}