I am using Keycloak (version 1.0.4.Final)
in JBOSS AS 7.1.1
You can use the keycloak command line admin tool to change the setting as long as it can authenticate to a local IP address. You can temporarily launch Keycloak on localhost to make this change.
kcadm.sh config credentials --server http://localhost:8080/auth --realm master --user admin
kcadm.sh update realms/realmname -s sslRequired=NONE
Obviously, make sure to replace realm names, username, port, etc as required.
For more information on getting started with the Admin CLI, see documentation: http://www.keycloak.org/docs/3.3/server_admin/topics/admin-cli.html