Ignore EOF error log for repair_test.py::TestRepair::test_dead_sync_participant
Ignore EOF error log for repair_test.py::TestRepair::test_dead_sync_participant

patch by ZhaoYang; reviewed by Sergio Bossa and Benjamin Lerer for
CASSANDRA-15666

blerer/cassandra-dtest,pcmanus/cassandra-dtest,blerer/cassandra-dtest