Reorder tests to not use the same number (#2947)

Distinct numbers make re-running individual tests easier by helping with
tab-completion.

Completeness verified using:
% for i in $(seq 0 600)
do
  files=$(ls testcases/t/$(printf "%03d" $i)-*.t 2>&- | wc -l)
  [ "$files" != "0" ] && [ "$files" != "1" ] && echo "clash: $i"
done

testcases/t/271-for_window_tilingfloating.t

@@ -0,0 +1,49 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+use i3test i3_autostart => 0;
+use X11::XCB qw(PROP_MODE_REPLACE);
+
+##############################################################
+# 13: check that the tiling / floating criteria work.
+##############################################################
+
+my $config = <<"EOT";
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+for_window [tiling] mark tiled
+for_window [floating] mark floated
+EOT
+
+my $pid = launch_with_config($config);
+my $tmp = fresh_workspace;
+
+open_window;
+open_floating_window;
+
+my @nodes = @{get_ws($tmp)->{nodes}};
+cmp_ok(@nodes, '==', 1, 'one tiling container on this workspace');
+is_deeply($nodes[0]->{marks}, [ 'tiled' ], "mark set for 'tiling' criterion");
+
+@nodes = @{get_ws($tmp)->{floating_nodes}};
+cmp_ok(@nodes, '==', 1, 'one floating container on this workspace');
+is_deeply($nodes[0]->{nodes}[0]->{marks}, [ 'floated' ], "mark set for 'floating' criterion");
+
+exit_gracefully($pid);
+
+##############################################################
+
+done_testing;