finally fixed randomly failing test in logs_unittest
finally fixed randomly failing test in logs_unittest


Former-commit-id: 2519e4668fec7d6b34a8f4887131f29e15b61561 [formerly d375669873adfe033217f048efe5ffa2fc95518e]
Former-commit-id: 4861418dc002544d9a1c259812c1d13b967498e4
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine