tests: safe MAPI init

[Ferenc Wagner]

Hi (and sorry for the broken post),

the mapi32 tests call scInitMapiUtil, which pops up an alert
box saying something like (translating it) "Your default
mailer application isn't capable of this operation, please
ensure that Outlook is configured as the default mailer."
This brings the tests to a halt, and even after clicking OK
one gets 65536 failures bumping the logs above 5 MB.

As a side note, most of the mapi tests are very careful
about calling every function through a pointer acquired by
GetProcAddr(), still the test executable is linked with
-lmapi32.  Does it make any sense?  From winetest's
perspective it isn't worth much, if a test can't run it's
skipped altogether.  Does it take care about different mapi
versions?

There are no recent reports on test.winehq.org/data, so
something is obviously wrong.  I'd be interested in hearing
about people running Chris' winrash service.  What happens
if you run winetest directly?  Don't forget to supply you
tag with the -t option!  Basically, winetest's own message
boxes are OK, system message boxes are a problem.

Thanks,
Feri.