Ensure that certain tests are only run when zlib has been detected.

This addresses in part the issues listed in #1005.

diff --git a/tests/base/boost_iostreams_01.output b/tests/base/boost_iostreams_01.with_zlib=on.output
similarity index 100%
rename from tests/base/boost_iostreams_01.output
rename to tests/base/boost_iostreams_01.with_zlib=on.output

diff --git a/tests/deal.II/grid_out_07.output b/tests/deal.II/grid_out_07.with_zlib=on.output
similarity index 100%
rename from tests/deal.II/grid_out_07.output
rename to tests/deal.II/grid_out_07.with_zlib=on.output

diff --git a/tests/deal.II/grid_out_08.output b/tests/deal.II/grid_out_08.with_zlib=on.output
similarity index 100%
rename from tests/deal.II/grid_out_08.output
rename to tests/deal.II/grid_out_08.with_zlib=on.output

diff --git a/tests/mpi/codim_01.mpirun=3.debug.output b/tests/mpi/codim_01.mpirun=3.with_zlib=on.debug.output
similarity index 100%
rename from tests/mpi/codim_01.mpirun=3.debug.output
rename to tests/mpi/codim_01.mpirun=3.with_zlib=on.debug.output

diff --git a/tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=10.output b/tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=10.with_zlib=on.output
similarity index 100%
rename from tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=10.output
rename to tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=10.with_zlib=on.output

diff --git a/tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=4.output b/tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=4.with_zlib=on.output
similarity index 100%
rename from tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=4.output
rename to tests/mpi/p4est_data_out_01.with_trilinos=true.mpirun=4.with_zlib=on.output

diff --git a/tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=1.output b/tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=1.with_zlib=on.output
similarity index 100%
rename from tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=1.output
rename to tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=1.with_zlib=on.output

diff --git a/tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=3.output b/tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=3.with_zlib=on.output
similarity index 100%
rename from tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=3.output
rename to tests/mpi/parallel_vtu_01.with_trilinos=true.mpirun=3.with_zlib=on.output