TESTS: Fix E211 pep8 issues on pysss_murmur-test.py
E211: whitespace before '('
This issue was found on a debian_testing machine.
Resolves:
https://pagure.io/SSSD/sssd/issue/3605
Reviewed-by: Michal Židek <mzidek@redhat.com>
Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>