OSGi bundle web deployer to integrate arquillian

This is the OSGi plugin that integrates arquillian deployment lifecycle with the portal. 

At the moment the Servlet is using active polling to detect when the ServletContext becomes available: https://github.com/csierra/liferay-plugins/blob/a105bbda74c7fcd91034af5a92f05dee374881eb/shared/arquillian-plugin-deployer/src/com/liferay/arquillian/DeployerServlet.java#L196

I guess we could change this and use the new Http Service feature that registers ServletContexts instead of BundleServletContexts. Anyhows this seems to be working now although it is using deprecated API's.