Change test np back to 2. (#113)

Author: jrood-nrel

test/CMakeLists.txt

@@ -50,7 +50,7 @@ macro(setup_test)
     file(MAKE_DIRECTORY ${CURRENT_TEST_BINARY_DIR})
     file(GLOB TEST_FILES "${CURRENT_TEST_SOURCE_DIR}/*")
     file(COPY ${TEST_FILES} DESTINATION "${CURRENT_TEST_BINARY_DIR}/")
-    set(TEST_NP 4)
+    set(TEST_NP 2)
     set(MPI_COMMANDS "${MPIEXEC_EXECUTABLE} ${MPIEXEC_NUMPROC_FLAG} ${TEST_NP} ${MPIEXEC_PREFLAGS}")
     if(AMReX_CUDA OR AMReX_HIP OR AMReX_SYCL)
       set(FCOMPARE_TOLERANCE "-r 1e-10 --abs_tol 1.0e-12")