On (client) Java7: I tried using our java "sender client" against my private OpenShift instance, but I am running into this Openshift bug ticket:
https://bugzilla.redhat.com/show_bug.cgi?id=975369

A "workaround" was setting this System.setProperty("jsse.enableSNIExtension", "false");, before submitting the HTTP request

That is NOT an option, but there are ways to work around it, and the README should state that:

• in standalone.xml's <system-properties> section
• in the Java app, that is using our SDK, via System.setProperty("jsse.enableSNIExtension", "false");
• commandline argument: -Djsse.enableSNIExtension=false