fixes duplicated names in temporary test weight files

input/instance_test_1_6.yaml

input/instance_test_1_7.yaml

tests/core/test_interp_method_file_parallel.c

tests/core/test_interp_stack_config.c

tests/core/test_interpolation_parallel3.c

tests/core/test_interpolation_parallel4.c

tests/core/test_interpolation_parallel5.c

tests/mci/test_instance_parallel1.c