Nevermind, got it...
D:\dev\server\keycloak-2.2.0.Final>bin\jboss-cli.bat
You are disconnected at the moment. Type 'connect' to connect to the server or 'help' for the list of supported commands.
[disconnected /] connect
[standalone@localhost:9990 /] /subsystem=keycloak-server:list-add(
index= name= value=
[standalone@localhost:9990 /] [standalone@localhost:9990 /] /subsystem=keycloak-server:list-add(name=providers,value=module:com.acme.idm.keycloak.jms-forwarding-event-listener)
{"outcome" => "success"}
[standalone@localhost:9990 /] ls /subsystem=keycloak-server
spi
theme
master-realm-name=master
providers=[expression "classpath:${jboss.home.dir}/providers/*","module:com.acme.idm.keycloak.idm-keycloak-ext-login-action","module:com.acme.idm.keycloak.jms-forwarding-event-listener"]
scheduled-task-interval=900
web-context=auth