In case sql connection is gone (error 2006), we finalize the connection to...

In case sql connection is gone (error 2006), we finalize the connection to avoid memory leaks in mariadb lib.

analytics/operators/persystsql/PerSystDB.cpp

@@ -70,7 +70,8 @@ std::mutex PerSystDB::mut;
 void PerSystDB::print_error(){
     	LOG(error) << "Error(" << mysql_errno(_mysql) << ") [" << mysql_sqlstate(_mysql) << "] \""<< mysql_error(_mysql) << "\"" ;
 	if(mysql_errno(_mysql) == 2006){
-		_initialized = false;
+		mysql_close(_mysql);
+		_initialized=false;
 	}
 }