Security update for salt

Open Source Vulnerabilities SUSE-SU-2020:3155-1

This update for salt fixes the following issues: - 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.