Our old version of MSVC doesn't understand CERT secure C coding standard
MEM 02-A.

Reported by:	damjan (through pescetti)

Reviewed by:	Don Lewis

Hinted from the OpenIndiana (Illumos) port by Alexander Pyhalov.

Patch by: Giuseppe Castagno

Patch by: Giuseppe Castagno.

#i125003# eliminate cppunittester, include files, and all cppunit usage in ported tests from from main/sal.

not libraries, so they don't need version maps any more.

changes made in poppler's commits 664865a2ddca9c20ac36a41aef52ebf12eab838d
and c0affb1845c339f89ca67608cb9fd9134ff902f5 in 2011. Also ports unit tests
from cppunit to Google Test, but they all fail due to UNO bootstrapping errors.

and run the tests on every build.

Drop useless casts while here.

We only really support a linear solver at this time so the test for 
non-linearity was actually useful. Make it optional (ON by default)
so that we can now override the check and provide a solution.

Submitted by:	Don Lewis

Patch by: Damjan Jovanovic <damjan@apache.org>

Patch by: Mark Hung <marklh9@gmail.com>

Patch by: Damjan Jovanovic <damjan@apache.org>

Patch by: Mark Hung <marklh9@gmail.com>

Patch by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>

Patch by: Giuseppe Castagno <giuseppe.castagno@acca-esse.eu>

Patch by: Damjan Jovanovic <damjan@apache.org>

When measuring time in seconds or minutes it is usually more
human-friendly to use multiples of 60.

It appears the check for non-linearity is causing failures for cases that 
can be solved by CoinMP and other solvers. We don't really have a 
non-linear solver but it doesn't make sense to check for linearity here.

Thanks to Ted Ralphs for pointing the exact code causing the failure.