Fix a unicode-related exception in testcase_manager. (#1590)
Fix a unicode-related exception in testcase_manager. (#1590)

Co-authored-by: Martin Barbella <98699d80167e7d40ec82a0b1ec72d18dbcc64afc@google.com>
google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz,google/clusterfuzz