Add cast to str in produciton config, as in testing

Author: v-reyder

rootfs/api/settings/production.py

@@ -309,7 +309,7 @@
 
 KUBERNETES_DEPLOYMENTS_REVISION_HISTORY_LIMIT = os.environ.get('KUBERNETES_DEPLOYMENTS_REVISION_HISTORY_LIMIT', None)  # noqa
 
-DEIS_DEFAULT_CONFIG_TAGS = os.environ.get('DEIS_DEFAULT_CONFIG_TAGS', '')
+DEIS_DEFAULT_CONFIG_TAGS = str(os.environ.get('DEIS_DEFAULT_CONFIG_TAGS', ''))
 
 # 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