[5.3] Added database slave failover#15553

Merged

taylorotwell merged 5 commits intolaravel:5.3from Data33:5.3

Nov 2, 2016

+53-6

Commits on Sep 21, 2016

Added database slave failover to laravel framework
Data33
committed

Commits on Sep 22, 2016

Commits on Sep 23, 2016

PDOException is now handled by ExceptionHandler
Data33
committed