geneo merge broke pdelab tests

apparently only certain configurations support the geneo code. Running with my local configuration the test fails:

Scanning dependencies of target testgeneo
[ 52%] Building CXX object dune/pdelab/test/CMakeFiles/testgeneo.dir/testgeneo.cc.o
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc: In function ‘void driver(std::__cxx11::string, std::__cxx11::string)’:
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:278:54: error: ‘GenEOBasis’ is not a member of ‘Dune::PDELab’
     subdomain_basis = std::make_shared<Dune::PDELab::GenEOBasis<GFS,M_EXTERIOR,V,1> >(gfs, AF_exterior, AF_ovlp, eigenvalue_threshold, *part_unity, nev, nev_arpack, 0.001, false, verb);
                                                      ^~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:278:28: error: parse error in template argument list
     subdomain_basis = std::make_shared<Dune::PDELab::GenEOBasis<GFS,M_EXTERIOR,V,1> >(gfs, AF_exterior, AF_ovlp, eigenvalue_threshold, *part_unity, nev, nev_arpack, 0.001, false, verb);
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:278:85: error: invalid operands of types ‘<unresolved overloaded function type>’ and ‘int’ to binary ‘operator>’
     subdomain_basis = std::make_shared<Dune::PDELab::GenEOBasis<GFS,M_EXTERIOR,V,1> >(gfs, AF_exterior, AF_ovlp, eigenvalue_threshold, *part_unity, nev, nev_arpack, 0.001, false, verb);
                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:280:54: error: ‘LiptonBabuskaBasis’ is not a member of ‘Dune::PDELab’
     subdomain_basis = std::make_shared<Dune::PDELab::LiptonBabuskaBasis<GFS,M_EXTERIOR,V,V,1> >(gfs, AF_exterior, AF_ovlp, -1, *part_unity, nev, nev_arpack);
                                                      ^~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:280:28: error: parse error in template argument list
     subdomain_basis = std::make_shared<Dune::PDELab::LiptonBabuskaBasis<GFS,M_EXTERIOR,V,V,1> >(gfs, AF_exterior, AF_ovlp, -1, *part_unity, nev, nev_arpack);
                            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:280:95: error: invalid operands of types ‘<unresolved overloaded function type>’ and ‘int’ to binary ‘operator>’
     subdomain_basis = std::make_shared<Dune::PDELab::LiptonBabuskaBasis<GFS,M_EXTERIOR,V,V,1> >(gfs, AF_exterior, AF_ovlp, -1, *part_unity, nev, nev_arpack);
                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:292:52: error: ‘TwoLevelOverlappingAdditiveSchwarz’ is not a member of ‘Dune::PDELab::ISTL’
   auto prec = std::make_shared<Dune::PDELab::ISTL::TwoLevelOverlappingAdditiveSchwarz<GFS,M,V,V>>(gfs, AF, coarse_space, true, verb);
                                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:292:20: error: parse error in template argument list
   auto prec = std::make_shared<Dune::PDELab::ISTL::TwoLevelOverlappingAdditiveSchwarz<GFS,M,V,V>>(gfs, AF, coarse_space, true, verb);
                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/christi/Uni/Dune/pdelab/dune/pdelab/test/testgeneo.cc:292:96: error: invalid operands of types ‘<unresolved overloaded function type>’ and ‘int’ to binary ‘operator>’
   auto prec = std::make_shared<Dune::PDELab::ISTL::TwoLevelOverlappingAdditiveSchwarz<GFS,M,V,V>>(gfs, AF, coarse_space, true, verb);
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

My configuration is:

-- The following OPTIONAL packages have been found:

 * dune-alugrid
 * dune-python
 * dune-uggrid
 * LATEX, Type setting system
   To generate the documentation
 * UnixCommands, Some common Unix commands
   To generate the documentation with LaTeX
 * Sphinx, Documentation generator, <www.sphinx-doc.org>
   To generate the documentation from CMake and Python sources
 * Doxygen, Class documentation generator, <www.doxygen.org>
   To generate the class documentation from C++ sources
 * PkgConfig, Unified interface for querying installed libraries
   To find Dune module dependencies
 * LAPACK, fast linear algebra routines
 * GMP, GNU multi-precision library including the C++ bindings GMPxx
   Multi-precision quadrature rules, basis function evaluation etc.
 * Inkscape, converts SVG images, <www.inkscape.org>
   To generate the documentation with LaTeX
 * TBB, Threading Building Blocks library
   Parallel programming on multi-core processors
 * Vc, C++ Vectorization library, <https://github.com/VcDevel/Vc>
   For use of SIMD instructions
 * PythonInterp
 * PythonLibs
 * SuperLU, Supernodal LU
   Direct solver for linear system, based on LU decomposition
 * ARPACK, ARnoldi PACKage
   Solve large scale eigenvalue problems
 * SuiteSparse
 * Alberta
 * ZLIB
 * MPI, Message Passing Interface library
   Parallel programming on multiple processors
   Parallel programming on multiple processors
 * Threads, Multi-threading library
 * PTScotch
 * Eigen3

-- The following REQUIRED packages have been found:

 * dune-common
 * dune-grid
 * dune-localfunctions
 * dune-istl
 * dune-typetree
 * dune-functions
 * dune-geometry

-- The following OPTIONAL packages have not been found:

 * dune-corepy
 * ARPACKPP, ARPACK++
   C++ interface for ARPACK
 * ParMETIS
 * Psurface
 * AmiraMesh
 * SIONlib
 * DLMalloc
 * ZOLTAN
 * METIS
 * PETSc