dist/redhat: stop using systemd macros, call systemctl directly

Fedora version of systemd macros does not work correctly on CentOS7,
since CentOS7 does not support "file trigger" feature.
To fix the issue we need to stop using systemd macros, call systemctl
directly.

See scylladb/scylla-jmx#94

Closes #8005

(cherry picked from commit 7b310c591e)

dist/redhat/scylla.spec

@@ -78,13 +78,18 @@ getent passwd scylla || /usr/sbin/useradd -g scylla -s /sbin/nologin -r -d %{_sh
 %post server
 /opt/scylladb/scripts/scylla_post_install.sh
 
-%systemd_post scylla-server.service
+if [ $1 -eq 1 ] ; then
+    /usr/bin/systemctl preset scylla-server.service ||:
+fi
 
 %preun server
-%systemd_preun scylla-server.service
+if [ $1 -eq 0 ] ; then
+    /usr/bin/systemctl --no-reload disable scylla-server.service ||:
+    /usr/bin/systemctl stop scylla-server.service ||:
+fi
 
 %postun server
-%systemd_postun scylla-server.service
+/usr/bin/systemctl daemon-reload ||:
 
 %posttrans server
 if  [ -d /tmp/%{name}-%{version}-%{release} ]; then
@@ -223,10 +228,18 @@ URL:            https://github.com/prometheus/node_exporter
 Prometheus exporter for machine metrics, written in Go with pluggable metric collectors.
 
 %post node-exporter
-%systemd_post node-exporter.service
+if [ $1 -eq 1 ] ; then
+    /usr/bin/systemctl preset node-exporter.service ||:
+fi
 
 %preun node-exporter
-%systemd_preun node-exporter.service
+if [ $1 -eq 0 ] ; then
+    /usr/bin/systemctl --no-reload disable node-exporter.service ||:
+    /usr/bin/systemctl stop node-exporter.service ||:
+fi
+
+%postun node-exporter
+/usr/bin/systemctl daemon-reload ||:
 
 %files node-exporter
 %defattr(-,root,root)