test: move TEST-30-ONCLOCKCHANGE setup to static files

The two timezone files are now installed in the global setup. I am not too
happy about this, but it still seems better than to create a completely
separate image just for this.

test/units/testsuite-30.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=TEST-30-ONCLOCKCHANGE
+
+[Service]
+ExecStart=/usr/lib/systemd/tests/testdata/units/%N.sh
+Type=oneshot

test/units/testsuite-30.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+set -ex
+set -o pipefail
+
+systemd-analyze log-level debug
+systemd-analyze log-target console
+
+systemctl disable --now systemd-timesyncd.service
+
+timedatectl set-timezone Europe/Berlin
+timedatectl set-time 1980-10-15
+
+systemd-run --on-timezone-change touch /tmp/timezone-changed
+systemd-run --on-clock-change touch /tmp/clock-changed
+
+! test -f /tmp/timezone-changed
+! test -f /tmp/clock-changed
+
+timedatectl set-timezone Europe/Kiev
+
+while ! test -f /tmp/timezone-changed ; do sleep .5 ; done
+
+timedatectl set-time 2018-1-1
+
+while ! test -f /tmp/clock-changed ; do sleep .5 ; done
+
+systemd-analyze log-level info
+
+echo OK > /testok
+
+exit 0