Test cases course 3 assignment2Clustering question 2 file name have two input sizes

[Haolicopter]

input_random_10_16_18.txt: this question test case name
input_random_10_16.txt: Other question test case name

This question test file names has two input sizes instead of one and python3 tester can only read one input size.

Traceback (most recent call last):
  File "tester/python3/tester.py", line 148, in <module>
    test(student_algorithm, test_cases_folder,  *option_values)
  File "tester/python3/tester.py", line 29, in test
    file_type, file_user, file_num, file_size = filename[:-4].split('_')
ValueError: too many values to unpack (expected 4)

[dgrcode]

Hi!

Thanks for raising this issue here. I saw you opened a PR #48. I'll have a look at it tomorrow.