Shared/Database: Improve dead-lock error handling

Improve dead-lock error handling in async transactions by retrying the transaction for up to 60 seconds instead of just 5 times

src/server/database/Database/DatabaseWorkerPool.cpp

@@ -238,6 +238,7 @@ void DatabaseWorkerPool<T>::DirectCommitTransaction(SQLTransaction& transaction)
     /// @todo More elegant way
     if (errorCode == ER_LOCK_DEADLOCK)
     {
+        //todo: handle multiple sync threads deadlocking in a similar way as async threads
         uint8 loopBreaker = 5;
         for (uint8 i = 0; i < loopBreaker; ++i)
         {