test: use set -eux and set -o pipefail everywhere

This should make the scripts more robust.

test/units/testsuite-02.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-#set -ex
-#set -o pipefail
+set -eux
+set -o pipefail
 
 NPROC=$(nproc)
 MAX_QUEUE_SIZE=${NPROC:-2}

test/units/testsuite-03.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -ex
+set -eux
+set -o pipefail
 
 # Test merging of a --job-mode=ignore-dependencies job into a previously
 # installed job.

test/units/testsuite-04.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
-set -x
-set -e
+set -eux
 set -o pipefail
 
 # Test stdout stream

test/units/testsuite-05.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
-set -x
-set -e
+set -eux
 set -o pipefail
 
 P=/run/systemd/system.conf.d

test/units/testsuite-06.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
-set -x
-set -e
+set -eux
 set -o pipefail
 
 echo 1 >/sys/fs/selinux/enforce || {

test/units/testsuite-07.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-set -x
-set -e
+set -eux
+set -o pipefail
 
 >/failed
 

test/units/testsuite-11.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -x
+set -eux
+set -o pipefail
 
 systemctl start fail-on-restart.service
 active_state=$(systemctl show --value --property ActiveState fail-on-restart.service)

test/units/testsuite-12.sh

@@ -1,6 +1,5 @@
 #!/usr/bin/env bash
-set -x
-set -e
+set -eux
 set -o pipefail
 
 U=/run/systemd/system/test12.socket

test/units/testsuite-13.sh

@@ -1,7 +1,6 @@
 #!/usr/bin/env bash
-set -x
-set -e
-set -u
+# shellcheck disable=SC2016
+set -eux
 set -o pipefail
 
 export SYSTEMD_LOG_LEVEL=debug

test/units/testsuite-14.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
-set -e
-set -x
+set -eux
+set -o pipefail
 
 function setup_root {
     local _root="$1"

test/units/testsuite-15.sh

@@ -1,6 +1,6 @@
-#! /bin/bash
-set -e
-set -x
+#!/bin/bash
+set -eux
+set -o pipefail
 
 _clear_service () {
     systemctl stop $1.service 2>/dev/null || :

test/units/testsuite-16.sh

@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
-set -v -x
+set -eux
+set -o pipefail
 
 rm -f /test.log
 

test/units/testsuite-17.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
-set -x
-set -e
+set -eux
+set -o pipefail
 
 >/failed
 

test/units/testsuite-18.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -ex
+set -eux
 set -o pipefail
 
 systemd-run --wait -p FailureAction=poweroff true

test/units/testsuite-19.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -ex
+set -eux
 set -o pipefail
 
 if grep -q cgroup2 /proc/filesystems ; then

test/units/testsuite-20.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -ex
+set -eux
 set -o pipefail
 
 systemd-analyze log-level debug

test/units/testsuite-22.01.sh

@@ -1,10 +1,11 @@
-#! /bin/bash
+#!/bin/bash
 #
 # With "e" don't attempt to set permissions when file doesn't exist, see
 # https://github.com/systemd/systemd/pull/6682.
 #
 
-set -e
+set -eux
+set -o pipefail
 
 rm -fr /tmp/test
 

test/units/testsuite-22.02.sh

@@ -1,10 +1,10 @@
-#! /bin/bash
+#!/bin/bash
 #
 # Basic tests for types creating directories
 #
 
-set -e
-set -x
+set -eux
+set -o pipefail
 
 rm -fr /tmp/{C,d,D,e}
 mkdir  /tmp/{C,d,D,e}

test/units/testsuite-22.03.sh

@@ -1,10 +1,10 @@
-#! /bin/bash
+#!/bin/bash
 #
 # Basic tests for types creating/writing files
 #
 
-set -e
-set -x
+set -eux
+set -o pipefail
 
 rm -fr /tmp/{f,F,w}
 mkdir  /tmp/{f,F,w}

test/units/testsuite-22.04.sh

@@ -1,10 +1,10 @@
-#! /bin/bash
+#!/bin/bash
 #
 # Basic tests for types creating fifos
 #
 
-set -e
-set -x
+set -eux
+set -o pipefail
 
 rm -fr /tmp/p
 mkdir  /tmp/p