[DOCS] COMPUTE_STATS_MIN_SAMPLE_SIZE keydef typo corrected
[DOCS] COMPUTE_STATS_MIN_SAMPLE_SIZE keydef typo corrected

Change-Id: I3fae14499a92bb00a2696b220751d4cc15aeb0a4
Reviewed-on: http://gerrit.cloudera.org:8080/10173
Reviewed-by: Alex Rodoni <b46da68bf9b818cec7052f7cdfe9b3e69485676b@cloudera.com>
Tested-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala