Image Name by Regex

Before I attempt to submit a PR, I wanted to know if this would have a chance of getting approved.

I would like to define an Image name by regular expression. Our openstack images get rebuilt every month. The new image names include the date. We have to update the image every other month because the Openstack team deletes the older images every other month. If we could specify the image name by regular expression and have it pick the latest, that would save us from having to update every month.

This commit was an attempt to add that back in 2014:
https://github.com/jenkinsci/openstack-cloud-plugin/commit/92ff61bec4aa9779d091bd9b518ecb259ad40896

Thanks