Timeouts when requesting Facebook

[maurociancio]

In FacebookAuthUtils.groovy (https://github.com/splix/grails-spring-security-facebook/blob/master/src/groovy/com/the6hours/grails/springsecurity/facebook/FacebookAuthUtils.groovy#L98 and https://github.com/splix/grails-spring-security-facebook/blob/master/src/groovy/com/the6hours/grails/springsecurity/facebook/FacebookAuthUtils.groovy#L136) requests are made to Facebook API.

The connection has no timeout so the request thread can block forever (I've experienced this with other api's, not with Facebook itself, but it can happen).