Running unit tests in parallel

[keceli]

I remember we had a discussion about it before but I couldn't find the issue. The problem is when you run unit tests in parallel with mpirun most of them fail with Segmentation violation signal. For PluginPlay and ParallelZone we don't have this problem, so the issue is TW specific.

I encounter this while trying to understand the problem with passing an mpi communicator to madness runtime. I can look into more, but first I wanted to see if this is already discussed somewhere.

Here is an incomplete list of failed tests:

/home/keceli/soft/nwx/TensorWrapper/tests/tensor/buffer/scalar_buffer.cpp:508: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/performance_tests/add.cpp:31: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/ta_helpers/einsum/einsum.cpp:56: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/diis/diis.cpp:48: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/tensor/creation.cpp:315: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/tensor/buffer/detail_/scalar_ta_buffer_pimpl.cpp:32: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/tensor/linear_algebra.cpp:90: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/tensor/linear_algebra.cpp:62: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/diis/diis.cpp:48: FAILED:
/home/keceli/soft/nwx/TensorWrapper/tests/ta_helpers/remove_redundancy.cpp:75: FAILED: