[do_jdbc] Fix for SELECT statements used with execute_non_query
[do_jdbc] Fix for SELECT statements used with execute_non_query

* Should fix the edge case in the do_mysql specs: SELECT sleep(1)

Signed-off-by: Alex Coles <07b1bd43bec0751d878a3f03ea589427ab84a876@mac.com>

simonkro/do_mysql,simonkro/do_mysql,simonkro/do_mysql