5312432 TESTS: Fix pep8 errors in test_ts_cache.py

1 file Authored by jhrozek 6 years ago, Committed by lslebodn 6 years ago,
    TESTS: Fix pep8 errors in test_ts_cache.py
    
    Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>
    Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
    (cherry picked from commit 84ae0c4345baf1a589a237bfd132acdaf7a56738)