Revert "Revert "Revert "Stop using hpcloud az1-az3 in favor of region-b"""

This reverts commit 58b430dc22b0e770ee0e6787c45967dd55bd06c0.

Change-Id: I9bec9fb8807d273f08287c43b83cd0b689ba1518
Merge "Revert "Revert "Revert "Stop using hpcloud az1-az3 in favor of region-b""""