test: clean up test server correctly

Fixes https://build.coopcloud.tech/toolshed/abra/2723/1/5

tests/integration/app_list.bats

@@ -88,6 +88,10 @@ teardown(){
   assert_success
   refute_output --partial "$TEST_RECIPE"
   assert_output --partial "foo-recipe"
+
+  run rm -rf "$ABRA_DIR/servers/foo.com"
+  assert_success
+  assert_not_exists "$ABRA_DIR/servers/foo.com"
 }
 
 @test "output is machine readable" {