WL#4142: Foreign Keys and InnoDB: implement storage engine API for Foreign Keys support

Affects: Server-6.1   —   Status: Un-Assigned

In order to properly handle foreign keys on top of the storage engine layer with
InnoDB, this storage engine will use the mechanism described in WL#148.

See also:

WL#3289 Foreign Keys & Falcon: Implement Storage Engine API for foreign key