db_lmdb: demote the "batch already enabled" log, it's harmless

src/blockchain_db/lmdb/db_lmdb.cpp

@@ -2778,10 +2778,10 @@ void BlockchainLMDB::set_batch_transactions(bool batch_transactions)
   LOG_PRINT_L3("BlockchainLMDB::" << __func__);
   if ((batch_transactions) && (m_batch_transactions))
   {
-    LOG_PRINT_L0("WARNING: batch transaction mode already enabled, but asked to enable batch mode");
+    MINFO("batch transaction mode already enabled, but asked to enable batch mode");
   }
   m_batch_transactions = batch_transactions;
-  LOG_PRINT_L3("batch transactions " << (m_batch_transactions ? "enabled" : "disabled"));
+  MINFO("batch transactions " << (m_batch_transactions ? "enabled" : "disabled"));
 }
 
 // return true if we started the txn, false if already started