ChainingHashTableTest.SimpleIteration Failure

[mbutrovich]

Spotted on #1617 which makes an unrelated change.

[ RUN      ] ChainingHashTableTest.SimpleIteration
/jenkins/workspace/terrier_PR-1617/test/execution/sql_chaining_hash_table_test.cpp:284: Failure
Expected equality of these values:
  reference.size()
    Which is: 499
  found_entries
    Which is: 500
/jenkins/workspace/terrier_PR-1617/test/execution/sql_chaining_hash_table_test.cpp:305: Failure
Expected equality of these values:
  reference.size()
    Which is: 499
  found_entries
    Which is: 500