Feat os env

Instead of hardcode username and password in the Vagrantfile, we can use ENV to get it. Only thing we need to do is source the openrc.sh before you run vagrant related command.

Could you add conditionals to read the ENV for either user or app credentials?

The app credentials aren't supported by the openstack plugin. Separate work effort to explore adding that feature.

merged

mentioned in commit 8bcc8207