[6/6] shell32/tests: Add server-side DDE checks.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=20064

Your paranoid android.


=== w1064 (32 bit shlexec) ===
shlexec.c:2435: Test failed: failed: rc=29 err=2
shlexec.c:2433: Test failed: ShlexecVar expected 'Present', but key not found or empty
shlexec.c:2435: Test failed: failed: rc=29 err=32
shlexec.c:2435: Test failed: failed: rc=29 err=2
shlexec.c:2433: Test failed: ShlexecVar expected 'Present', but key not found or empty
shlexec.c:2435: Test failed: failed: rc=29 err=32

=== w1064 (64 bit shlexec) ===
shlexec.c:2435: Test failed: failed: rc=29 err=2
shlexec.c:2435: Test failed: failed: rc=29 err=2
shlexec.c:2433: Test failed: ShlexecVar expected 'Present', but key not found or empty
shlexec.c:2435: Test failed: failed: rc=29 err=32
shlexec.c:2447: Test failed: ddeExec expected '[ifexec("C:\Users\winetest\AppData\Local\Temp\wt209B.tmp\test file.sde")]', got '[open("C:\Users\winetest\AppData\Local\Temp\wt209B.tmp\test file.sde")]'
shlexec.c:2435: Test failed: failed: rc=29 err=2
shlexec.c:2435: Test failed: failed: rc=29 err=2