Revert "LXC: show used memory as 0 when domain is not active"
    
    This reverts commit 1ce7c1d20cfd5afb26d2dbc88201085d52415d0e,
    which introduced a significant semantic change to the
    virDomainGetInfo() API. Additionally, the change was only
    made to 2 of the 15 virt drivers.
    
    Conflicts:
    	src/qemu/qemu_driver.c
    
    Signed-off-by: Jim Fehlig <jfehlig@suse.com>