This test also tests the CoinMP solver, no _lpsolver is misleading

Change-Id: If56de3aa84ec80b1888aadeb940e08e65083c9e9
Reviewed-on: https://gerrit.libreoffice.org/41607Reviewed-by: Rene Engelhard <rene@debian.org>
Tested-by: Rene Engelhard <rene@debian.org>