Rename test directories in infix_containers/ to remove the redundant
'container_' prefix since they already live under infix_containers/:
container_basic -> basic
container_bridge -> bridge
container_enabled -> enabled
container_environment -> environment
container_firewall_basic -> firewall_basic
container_host_commands -> host_commands
container_phys -> phys
container_veth -> veth
container_volume -> volume
Also update references in all.yaml and Readme.adoc files.
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
