CamelModelFactory not always initialized properly

While testing some SwitchYard issues, I stumbled upon a problem where the CamelModelFactory's getLatestCamelVersion() method isn't initialized properly when called statically from outside the Camel plug-ins. As a result, it was bombing on the line:

return supportedCamelModels.keySet().iterator().next();

Since the keySet wasn't being checked to be empty.