Security update for Salt

Open Source Vulnerabilities SUSE-SU-2020:3244-1

This update fixes the following issues: salt: - Avoid regression on 'salt-master': set passphrase for salt-ssh keys to empty string (bsc#1178485) - Properly validate eauth credentials and tokens on SSH calls made by Salt API (bsc#1178319, bsc#1178362, bsc#1178361, CVE-2020-25592, CVE-2020-17490, CVE-2020-16846) - Fix disk.blkid to avoid unexpected keyword argument '__pub_user' (bsc#1177867) - Ensure virt.update stop_on_reboot is updated with its default value - Do not break package building for systemd OSes - Drop wrong mock from chroot unit test - Support systemd versions with dot (bsc#1176294) - Fix for grains.test_core unit test - Fix file/directory user and group ownership containing UTF-8 characters (bsc#1176024) - Several changes to virtualization: - Fix virt update when cpu and memory are changed - Memory Tuning GSoC - Properly fix memory setting regression in virt.update - Expose libvirt on_reboot in virt states - Support transactional systems (MicroOS) - Zypperpkg module ignores retcode 104 for search() (bsc#1159670) - Xen disk fixes. No longer generates volumes for Xen disks, but the corresponding file or block disk (bsc#1175987) - Invalidate file list cache when cache file modified time is in the future (bsc#1176397) - Prevent import errors when running test_btrfs unit tests