Single test page that synthesizes every infrastructure part

We should create an xwiki page which loads in less than 2 minutes and pulls from multiple sources assembling something such as word so that AlertSite can detect that there's any single breakage in our production's infrastructure. It should pull from:

• both cluster nodes of xwiki
• some static file in the xwiki webapp
• solr
• wordpress (without cache)
• some static file in prod-web