Stop functions from printing during unit tests

[amhanson9]

Functions that print: check_aips(), check_config(), seed_data(), verify_warc_fixity() - from md5deep, warc_download.py

Description: During a unit test in PyCharm, anything the function prints displays red in the terminal, so it initially looks like the test may have failed even if it passed. Is there a way to keep a function from printing during a test?