Support setting maxUnvailable for Deployments #62
Description
From @helgi on July 13, 2016 18:49
Deployments support maxSurge and maxUnavailable when it comes to the RollingUpdate of pods
maxSurge is taken care of with the DEPLOY_BATCHES but maxUnavailable is assumed 0 to be in sync with previous Deis deploy logic
Copied from original issue: deis/controller#876