Match mysql max_allowed_packet to be same as production

[Nikschavan]

This can be checked by running the query - SHOW VARIABLES LIKE 'max_allowed_packet';

On prod/dev/staging environments this value is much larger but on local-server this is only 4M, If you import a copy of production/dev database to your local-server it throws constant errors for the query size being larger than the max_allowed_packet