Fix python setup.py version to be complaint with legacy builds. (#832)
Fix python setup.py version to be complaint with legacy builds. (#832)

Fixes #831
illfelder/compute-image-packages,zmarano/compute-image-packages,illfelder/compute-image-packages,rjschwei/compute-image-packages,wrigri/compute-image-packages,wrigri/compute-image-packages,rjschwei/compute-image-packages,wrigri/compute-image-packages,zmarano/compute-image-packages,wrigri/compute-image-packages,GoogleCloudPlatform/compute-image-packages