Fix flakey test_remote_query - cql_test.TestCQLSlowQuery test
Fix flakey test_remote_query - cql_test.TestCQLSlowQuery test

Patch by Ekaterina Dimitrova, reviwed by brandonwilliams for CASSANDRA-15307

pauloricardomg/cassandra-dtest,blerer/cassandra-dtest,pcmanus/cassandra-dtest,stef1927/cassandra-dtest,stef1927/cassandra-dtest,blerer/cassandra-dtest,pauloricardomg/cassandra-dtest