Merge pull request #2355 from chornyi/1.7.0

 Handle disconnects for MySQL read replicas with connection pooling

lib/dialects/mysql/connector-manager.js

@@ -68,6 +68,13 @@ module.exports = (function() {
             return this.write.release(client);
             return this.write.release(client);
           }
           }
         },
         },
+        destroy: function (client) {
+          if (client.queryType == 'read') {
+            return this.read.destroy(client);
+          } else {
+            return this.write.destroy(client);
+          }
+        },
         acquire: function (callback, priority, queryType) {
         acquire: function (callback, priority, queryType) {
           if (queryType == 'SELECT') {
           if (queryType == 'SELECT') {
             this.read.acquire(callback, priority);
             this.read.acquire(callback, priority);