test: move TEST-26-SETENV setup to static files

Also run mask_supporting_services() here.

test/TEST-26-SETENV/test.sh

@@ -12,21 +12,9 @@ test_setup() {
         eval $(udevadm info --export --query=env --name=${LOOPDEV}p2)
 
         setup_basic_environment
-
-        # setup the testsuite service
-        cat >$initdir/etc/systemd/system/testsuite.service <<EOF
-[Unit]
-Description=Testsuite service
-
-[Service]
-ExecStart=/bin/bash -x /testsuite.sh
-Type=oneshot
-EOF
-        cp testsuite.sh $initdir/
-
-        setup_testsuite
+        mask_supporting_services
     )
     setup_nspawn_root
 }
 
-do_test "$@"
+do_test "$@" 26

test/units/testsuite-26.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=TEST-26-SETENV
+
+[Service]
+ExecStart=/usr/lib/systemd/tests/testdata/units/%N.sh
+Type=oneshot