There is a race condition between starting an lxc container and executing
the first ansible task. Ansible makes heavy use of /tmp and the first
task executed after 'lxc-start' will collide with systemd-tmpfiles-setup
which by default removes all content from /tmp, including the working
files of any ansible task which happens to be running. This causes a fatal
error for ansible which cannot be recovered with retries.
This patch adds a raw command to check the state of the tmpfiles-setup
service and wait until it has completed, avoiding the race confdition.
Change-Id: I4ada8473bfd17b763bde16ac95099ddf7deb541c
8e9bdba322