CLIMATE-548 Vagrant references should not exist in easy-ocw ubuntu script

Pull request for https://issues.apache.org/jira/browse/CLIMATE-548
Additionally, this patch renames the Ubuntu install script and also updates this within the Vagrant file.
The Mac OSX script is not named by version, the Ubuntu script should shadow this behavior.

I am NOT sure about the new Python parth... is it OK to assume that Climate will always ben installed in ${HOME}/climate ?
i personally don't think it is but I want to hear from others please.