Security update for rmt-server

Open Source Vulnerabilities SUSE-SU-2019:1973-1

This update for rmt-server to version 2.3.1 fixes the following issues: - Fix mirroring logic when errors are encountered (bsc#1140492) - Refactor RMT::Mirror to download metadata/licenses in parallel - Check repo metadata GPG signatures during mirroring (bsc#1132690) - Add rmt-server-config subpackage with nginx configs (fate#327816, bsc#1136081) - Fix dependency to removed boot_cli_i18n file (bsc#1136020) - Add `rmt-cli systems list` command to list registered systems - Fix create UUID when system_uuid file empty (bsc#1138316) - Fix duplicate nginx location in rmt-server-pubcloud (bsc#1135222) - Mirror additional repos that were enabled during mirroring (bsc#1132690) - Make service IDs consistent across different RMT instances (bsc#1134428) - Make SMT data import scripts faster (bsc#1134190) - Fix incorrect triggering of registration sharing (bsc#1129392) - Fix license mirroring issue in some non-SUSE repositories (bsc#1128858) - Update dependencies to fix vulnerabilities in rails (CVE-2019-5419, bsc#1129271) and nokogiri (CVE-2019-11068, bsc#1132160) - Allow RMT registration to work under HTTP as well as HTTPS. - Offline migration from SLE 15 to SLE 15 SP1 will add Python2 module - Online migrations will automatically add additional modules to the client systems depending on the base product - Supply log severity to journald - Breaking Change: Added headers to generated CSV files