tests/test_spams_sandbox.py: Set number of threads for SPAMS to 1.
tests/test_spams_sandbox.py: Set number of threads for SPAMS to 1.

nanshe-org/nanshe,nanshe-org/nanshe,jakirkham/nanshe,DudLab/nanshe,jakirkham/nanshe,DudLab/nanshe