Add ReconnectOption to mysql

src/db/MySqlAccounts.cpp

@@ -225,7 +225,8 @@ MySqlAccounts::MySqlAccounts(
     : current_bc_status {_current_bc_status}
 {
     // create connection to the mysql
-    conn = make_shared<MySqlConnector>();
+    conn = make_shared<MySqlConnector>(
+            new mysqlpp::ReconnectOption(true));
 
     _init();
 }