Update 01034_prewhere_max_parallel_replicas.sql

dbms/tests/queries/0_stateless/01034_prewhere_max_parallel_replicas.sql

 drop table if exists test_max_parallel_replicas_lr;
 
+-- If you wonder why the table is named with "_lr" suffix in this test.
+-- No reason. Actually it is the name of the table in Yandex.Market and they provided this test case for us.
+
 CREATE TABLE test_max_parallel_replicas_lr (timestamp UInt64) ENGINE = MergeTree ORDER BY (intHash32(timestamp)) SAMPLE BY intHash32(timestamp);
 INSERT INTO test_max_parallel_replicas_lr select number as timestamp from system.numbers limit 100;
 
 SET max_parallel_replicas = 2;
 select count() FROM remote('127.0.0.{2|3}', currentDatabase(), test_max_parallel_replicas_lr) PREWHERE timestamp > 0;
+
+drop table test_max_parallel_replicas_lr;