Use `sudo journalctl` for non-privileged user in AA tests

Access to system journal is restricted for user after switching to
Debian. AppArmor tests need to check system log with journalctl but
without proper permissions they fail.
Adding sudo for non-root users allows to check the log entries and
compare the output with expected.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

run-aa-test

@@ -124,7 +124,14 @@ sleep 3
 
 # Get audit information from journal
 AUDIT_FILE=${TMP_DIR}/AUDIT
-journalctl -S "${START_TIME}" -t audit -o cat > ${AUDIT_FILE}
+
+uid=$(id -u)
+JOURNALCTL="journalctl"
+if [ "${UID}" != "0" ]
+then
+	JOURNALCTL="sudo journalctl"
+fi
+${JOURNALCTL} -S "${START_TIME}" -t audit -o cat > ${AUDIT_FILE}
 
 echo "#=== ${TEST_TITLE} ==="