fix rpm upgrade tests after MDEV-37726

MDEV-37726 moved wsrep-start-position to INSTALL_RUNDATADIR
and made the latter to be created by systemd-tmpfiles.

Now postin scriptlet has to run systemd-tmpfiles explicitly
to make sure INSTALL_RUNDATADIR exists before restarting
the server.

followup for 649216e

Author: vuvova

support-files/rpm/server-postin.sh

@@ -1,5 +1,6 @@
 if [ -f /usr/lib/systemd/system/mariadb.service -a -x /usr/bin/systemctl ]; then
   systemd_conf=/etc/systemd/system/mariadb.service.d/migrated-from-my.cnf-settings.conf
+  systemd-tmpfiles --create mariadb.conf
   if [ -x %{_bindir}/mariadb-service-convert -a ! -f "${systemd_conf}" ]; then
     # Either fresh install or upgrade non-systemd -> systemd
     mkdir -p /etc/systemd/system/mariadb.service.d

support-files/rpm/server-posttrans.sh

@@ -3,7 +3,7 @@ if [ -r %{restart_flag} ] ; then
   # only restart the server if it was already running
   if [ -x /usr/bin/systemctl ] ; then
     /usr/bin/systemctl daemon-reload > /dev/null 2>&1
-    if /usr/bin/systemctl is-active mysql; then
+    if /usr/bin/systemctl -q is-active mysql; then
       /usr/bin/systemctl restart mysql > /dev/null 2>&1
     else
       /usr/bin/systemctl try-restart mariadb.service > /dev/null 2>&1