This recommended update for vm-install fixes the following issues:

- Maintenance update for 13.1

* Fix free_memory to return correct amount of available memory

* bnc#885052 - vm-install and virt-install cannot install SLES12 systems

* bnc#882092 - Installing SLES12 as a VM on SLES11 SP3 fails because of btrfs in the VM
* Add a dependency on package grub2-x86_64-xen for grub.xen. Required for booting sles12 and rhel7 PV VMs using btrfs

* bnc#881573 - kvm vm install does not report full system memory

* KVM: Fix libvirt connection when running vm-install in background

* bnc#862605 - SLES 11 SP3 vm-install should get SLES 12 support when released
* bnc#862608 - SLES 11 SP3 vm-install should get RHEL 7 support when released
* Output to stdout instead of stderr when 'vm-install -O' is used