Description:
============
To improve the coverage of auto increment code, two MTR tests have been added.
One of them tests auto increment on InnoDB and the other one tests the same
with replication.

Reviewed-by: Vinay Fisrekar <vinay.fisrekar@oracle.com>
Reviewed-by: Viswanatham Gudipathi <viswanatham.gudipati@oracle.com>
Reviewed-by: Parveez Baig <parveez.baig@oracle.com>
RB: 11549