HPCC-12143 Add port to MySQL example code

Signed-off-by: Jim DeFabia <jamesdefabia@lexisnexis.com>
Merge pull request #6413 from JamesDeFabia/12143AddPort_toMySQLExampleCode

HPCC-12143 Add port to MySQL example code

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>