This is similar to commit b226383a
(tdf#116371: export rotation of SwGrfNode, 2019-01-26), just this is for
RTF, not DOCX.

Make sure we don't test the ODT import result as it's done already in
CppunitTest_sw_ooxmlexport13.

Change-Id: Iaf2d3011c45f3459e920f679683b1a45de42efe7
Reviewed-on: https://gerrit.libreoffice.org/67218Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins