ref(deploy): rename DEPLOY_BATCHES to DEIS_DEPLOY_BATCHES

Closes #683

Author: helgi

rootfs/api/models/app.py

@@ -342,7 +342,7 @@ def deploy(self, release):
             self.save()
 
         # see if the app config has deploy batch preference, otherwise use global
-        batches = release.config.values.get('DEPLOY_BATCHES', settings.DEPLOY_BATCHES)
+        batches = release.config.values.get('DEIS_DEPLOY_BATCHES', settings.DEIS_DEPLOY_BATCHES)
 
         # deploy application to k8s. Also handles initial scaling
         deploys = {}

rootfs/deis/settings.py

@@ -273,7 +273,7 @@
 # Defaults to None, the default is to deploy to as many nodes as
 # the application has been instructed to run on
 # Can also be overwritten on per app basis if desired
-DEPLOY_BATCHES = os.environ.get('DEPLOY_BATCHES', None)
+DEIS_DEPLOY_BATCHES = os.environ.get('DEIS_DEPLOY_BATCHES', None)
 
 # How long k8s waits for a pod to finish work after a SIGTERM before sending SIGKILL
 KUBERNETES_POD_TERMINATION_GRACE_PERIOD_SECONDS = int(os.environ.get('KUBERNETES_POD_TERMINATION_GRACE_PERIOD_SECONDS', 30))  # noqa