When try to secure Hawtio admin console by keycloak, there is an error in the log during Fuse startup:

| KeycloakServlet | 282 - io.hawt.hawtio-web - 1.4.0.redhat-630278 | Couldn't find keycloak config file on location: /tmp/fuse/etc/keycloak-hawtio-client.json

08:29:07,516 | WARN | ender-2-thread-1 | KeycloakServlet | 282 - io.hawt.hawtio-web - 1.4.0.redhat-630278 | Keycloak client configuration not found!

The error is caused by this line (which expects URL instead of file path)
https://github.com/hawtio/hawtio/blob/master/hawtio-system/src/main/java/io/hawt/web/keycloak/KeycloakServlet.java#L126

This change is not backward compatible. It would be also nice to log the exception and don't hide it.

Tested Fuse version: 6.3.0.redhat-278