fedora-spec: added systemd post/postun/pre/preun sections

The systemd requires some actions when the package is
installed, upgraded or removed. This patch adds the
needed RPM sections with the missing systemd actions.

There is a change in behavior - the service is not enabled
or started by default.

Signed-off-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

rhel/openvswitch-fedora.spec.in

@@ -158,9 +158,16 @@ touch $RPM_BUILD_ROOT%{_sysconfdir}/openvswitch/system-id.conf
 rm -rf $RPM_BUILD_ROOT
 
 %preun
-# Package removal, not upgrade
-systemctl stop openvswitch.service
-systemctl disable openvswitch.service
+%if 0%{?systemd_preun:1}
+    %systemd_preun %{name}.service
+%else
+    if [ $1 -eq 0 ] ; then
+    # Package removal, not upgrade
+        /bin/systemctl --no-reload disable %{name}.service >/dev/null 2>&1 || :
+        /bin/systemctl stop %{name}.service >/dev/null 2>&1 || :
+    fi
+%endif
+
 
 %post
 if test ! -e /etc/openvswitch/conf.db; then
@@ -175,11 +182,28 @@ if test ! -e /etc/openvswitch/conf.db; then
             '[{"op": "insert", "table": "Open_vSwitch", "row": {}}]' \
             > /dev/null
 fi
-# Initial installation
-systemctl enable openvswitch.service
-systemctl start openvswitch.service
+
+%if 0%{?systemd_post:1}
+    %systemd_post %{name}.service
+%else
+    # Package install, not upgrade
+    if [ $1 -eq 1 ]; then
+        /bin/systemctl daemon-reload >dev/null || :
+    fi
+%endif
+
 
 %postun
+%if 0%{?systemd_postun_with_restart:1}
+    %systemd_postun_with_restart %{name}.service
+%else
+    /bin/systemctl daemon-reload >/dev/null 2>&1 || :
+    if [ "$1" -ge "1" ] ; then
+    # Package upgrade, not uninstall
+        /bin/systemctl try-restart %{name}.service >/dev/null 2>&1 || :
+    fi
+%endif
+
 
 %files -n python-openvswitch
 %{python_sitelib}/ovs