Revert "Revert "Disable restart of docker""

This reverts commit 76db732f1b.

test/640_proxy_restart_reattaches_test.sh

@@ -42,10 +42,11 @@ run_on $HOST1 sudo kill -KILL $(docker_on $HOST1 inspect --format='{{.State.Pid}
 sleep 1
 check_attached
 
+# Disabled because Docker 1.8 often fails to restart weave or weaveproxy
 # Restart docker itself, using different commands for systemd- and upstart-managed.
-run_on $HOST1 sh -c "command -v systemctl >/dev/null && sudo systemctl restart docker || sudo service docker restart"
-wait_for_proxy $HOST1
-check_attached
+#run_on $HOST1 sh -c "command -v systemctl >/dev/null && sudo systemctl restart docker || sudo service docker restart"
+#wait_for_proxy $HOST1
+#check_attached
 
 # Restarting proxy shouldn't kill unattachable containers
 proxy_start_container $HOST1 -di --name=c3 --restart=always # Use ipam, so it won't be attachable w/o weave