Revert "Merge pull request #759 from edx/jarv/change-devstack-to-release"

This reverts commit 45716d5163e7f08a7ad8c2bfbf5ae5aad2381397, reversing
changes made to 8463b336ad749c9f7c2ec7947c0901f202ab3495.
Merge pull request #764 from edx/jarv/revert-759

Revert "Merge pull request #759 from edx/jarv/change-devstack-to-release...