Unnecesary call to function in EventLogConverter

added translation for events in Samigo.

To maintain retrocompatibility it determines if the text retrieved from database is a key or a value. If it’s a key it gets the value from properties.

However it always tries to get the value from properties without looking if it’s a key, so an unnecesary call is done. Even worse, that call writes an error line in Tomcat’s logs.

java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key Sin errores (El usuario envió)

A very simple change can fix this.