Post push fix:
main.heap_hash fails on 32 bit build with result content mismatch
for cardinality.

The cardinality is calculated by formula (records / records_per_key).
The result of the above calculation gives different value due to
difference in float point number representation in 32bit and 64bit CPU.

Fix the number of rows in the table to get consistent value for index
cardinality in the test case.