issue with atom-feed module.

@Ayesh Could you open a ticket for this? Basically MySQL 5.7 by default runs in strict mode and rejects a non-nullable TIMESTAMP column without a default value. This can probably be fixed by changing the definition here to:

<column name="date_created" type="timestamp" defaultValueDate="CURRENT_TIMESTAMP" />

And adding the current checksum as a <validCheckSum>.