Switched-off suspicious kernel's functionality: eigenvals and gms

NOTE: it seems that kernel's eigenval&gms are not tested in master and
may produce wrong results (see https://github.com/Singular/Sources/issues/336)

Suspicious tests include:
Manual/fouriersystem.tst, Manual/Gauss-Manin_connection_1.tst,
Manual/goodBasis.tst, Manual/monodromy.tst, Manual/qepcadsystem.tst,
Manual/spectrum.tst, Manual/sppairs.tst, Manual/tmatrix.tst,
Manual/vfilt.tst, Manual/vwfilt.tst

+ the following which run out of time: Manual/Gauss-Manin_connection.tst,
Manual/monodromyB.tst, Manual/bernstein.tst, Short/gaussm_ex.tst,
Short/monodromy_s.tst