Add Connector Operation returns success even if connector fails to start

Steps to reproduce:

1) start standalone server
2) issue:

/socket-binding-group=standard-sockets/socket-binding=https:add(port=8443)
/subsystem=web/connector=test-connectr:add(socket-binding=https, scheme=https, protocol="HTTP/1.1", enabled=true)

What happens is that created connector fails to start due to misssing keystore file. However the configuration model is updated and the operation returns success.

I think that the model should be rolled back and the operation should return failure.