Add container defined
Add container defined

Add container defined to make sure that the container
exists.

Signed-off-by: Chuck Short <753a8074f04ffd62a8fff7516e3ae689be8e35ad@canonical.com>

ivuk/pylxd,lxc/pylxd,lxc/pylxd,javacruft/pylxd,Saviq/pylxd,tych0/pylxd