#975 Mysql default parser: parse also lines with using password NO (#976)

config/patterns/mysql

@@ -1 +1 @@
-MYSQL_AUTH_FAIL %{TIMESTAMP_ISO8601:time} %{NUMBER} \[Note\] Access denied for user '%{DATA:user}'@'%{IP:source_ip}' \(using password: YES\)
+MYSQL_AUTH_FAIL %{TIMESTAMP_ISO8601:time} %{NUMBER} \[Note\] Access denied for user '%{DATA:user}'@'%{IP:source_ip}' \(using password: %{WORD:using_password}\)