ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)

Travis file: https://github.com/Saibamen/HotelManager/blob/master/.travis.yml

I already added mysql and mariadb support, but it still not working: https://travis-ci.org/github/Saibamen/HotelManager/builds/693880636

Previously working jobs: https://travis-ci.org/github/Saibamen/HotelManager/builds/504278931

https://travis-ci.org/github/Saibamen/HotelManager/jobs/693880639#L240

MariaDB packages may be broken.

Looks like a duplicate of

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