Setting tag bootmanager-5.2-1

Setting tag bootmanager-5.2-1
merged the branches for vserver and lxc
requires the rest of 5.2 - notably 'virt' in GetNodeFlavour
note that WriteModprobeConfig and MakeInitrd are turned off for lxc nodes
also note that fsck management for btrfs/lxc is still weak
vs_ROOT_SIZE=14G lxc_ROOT_SIZE=70G
vs_TOTAL_MINIMUM_DISK_SIZE=50G lxc_TOTAL_MINIMUM_DISK_SIZE=120G
expects ntpd to be turned on in the nodeimage