SwModelTestBase: write csv output to stdout

This way a 2>/dev/null output still gives a csv, even if there were
various other warnings in the meantime.

Change-Id: I6ed3de4058c829e856286c7d484d6ed436c362a4
CppunitTest_sw_ooxmlexport: speed up activex*

There were quite some unrelated content in these test documents...

1m24.754s -> 1m4.757s

Change-Id: I5e12a4c82c8c6f4454d2b2113d11aa289e125832