Support MYSQLD_OPTS and _WSREP_NEW_CLUSTER env vars in init script,

Fix issues found by rpmdiff, particularly:
- left-over from switching pid file dir,

Handle left-over files that do not uninstall
Fix uninstalled directories
Files outside of /opt/rh should be in syspath package
Split mariadb package to more sub-packages to match upstream's RPM list

Support --defaults-group-suffix properly in systemd unit file
Run mysql-prepare-db-dir as non-root

Rebase to 10.2.8

Re-enable tests

Allow 4567 port for tcp as well

Install mysql-wait-ready on RHEL-6 for the SysV init
Do not use mysql-wait-stop on RHEL-7 service files

Enable tests

Re-add README and LICENSE files, fix dangling symlinks

Rebase to 10.2.7
Use "/run" location instead of "/var/run" symlink
Enable building of mysqlbackup and include small fixes from Fedora
Marge more mostly format related changes from Fedora to keep the spec better

Fix the SELinux context of mysqld_safe_helper on rhel-6 as well

Define SELinux context for mysqld_safe_helper

Use configured paths in galera_recovery.sh

Re-enable tests without --ssl and --big-test that fail

Fix mysql-prepare-db-dir for CVE-2017-3265