Upgrade to newer mysql-apt-config for travis CI.
Upgrade to newer mysql-apt-config for travis CI.

idb-project/the-idb,rbns/the-idb,rbns/the-idb,idb-project/the-idb,dra/the-idb,dra/the-idb,fkr/the-idb,dra/the-idb,rbns/the-idb,rbns/the-idb,idb-project/the-idb,fkr/the-idb,idb-project/the-idb,fkr/the-idb,dra/the-idb,fkr/the-idb