AGSMPLPUSH-42 "xhr_streaming/xhr_polling protocols are not working"

[danbev]

This PR is dependent upon #66 which should be processed before this PR.

When testing locally you need to update standalone.xml by either running:

wildfly-8.0.0.Final/bin/jboss-cli.sh --file=wildfly-module/src/main/resources/wildfly-config.cli

Or manually updating standalone.xml:

<server socket-binding="simplepush" password="changeMe!" sockjs-session-timeout="604800000" sockjs-tls="false">
    <datastore>
        <in-memory/>
    </datastore>
</server>

A very basic client is available:
https://github.com/danbev/aerogear-simplepush-server/blob/AGSMPLPUSH-42-polling-transports-fix/server-netty/src/test/resources/sockjs-client.html
This has to be run in a web server and allows you to change the SockJS transport protocols.

[danbev]

An OpenShift instance based on this PR is available here:
https://sps010-dbevenius.rhcloud.com:8443/simplepush

[abstractj]

Thanks @danbev