SUSE-SU-2020:3244-1 Security update for Salt

This update fixes the following issues: salt: - Avoid regression on 'salt-master': set passphrase for salt-ssh keys to empty string bsc1178485 - Properly validate eauth credentials and tokens on SSH calls made by Salt API bsc1178319, bsc1178362, bsc1178361, CVE-2020-25592, CVE-2020-17490,...