fix(units): controller waits for logger container in ExecStartPre

Author: Gabriel Monroy

units/deis-controller.service

@@ -6,6 +6,7 @@ After=deis-logger@1.service
 [Service]
 EnvironmentFile=/etc/environment
 TimeoutStartSec=20m
+ExecStartPre=/bin/sh -c "echo Waiting for deis-logger to start... ; until docker inspect deis-logger >/dev/null 2>&1; do sleep 2; done"
 ExecStartPre=/bin/sh -c "IMAGE=`/run/deis/bin/get_image /deis/controller`; docker history $IMAGE >/dev/null || docker pull $IMAGE"
 ExecStartPre=/bin/sh -c "docker inspect deis-controller >/dev/null && docker rm -f deis-controller || true"
 ExecStart=/bin/sh -c "IMAGE=`/run/deis/bin/get_image /deis/controller` && docker run --name deis-controller --rm -p 8000:8000 -e PUBLISH=8000 -e HOST=$COREOS_PRIVATE_IPV4 --volumes-from=deis-logger $IMAGE"