runners/dbmysql: Fix mixed indentation.
runners/dbmysql: Fix mixed indentation.

This fixes the following warning:
    Mixed Indentation: Tab found

Signed-off-by: Enric Balletbo i Serra <84b0e7bf25d36728076eb55422a35b75ccc0ab37@iseebcn.com>

eballetbo/igep_qa,eballetbo/igep_qa