request.getRemoteUser() does not return a logged in user

This change http://svn.atlassian.com/fisheye/changelog/public?cs=39411 http://svn.atlassian.com/fisheye/cru/CR-517#c3145 has broken confluence's invite plugin.

The plugin used to rely on the fact that after calling getAuthenticator().login(ServletActionContext.getRequest(), ServletActionContext.getResponse(), username, password, true); the request.getRemoteUser will return the username of logged in user. After we changed the BaseLoginFilter to cache the principle it no longer does that.

I changed the plugin so it is no longer affected...