DigaPorter: Remove date information of original file by DigaPorter

When trying to import a file by DigaPorter usually the timestamp of that file will be used for the timestamp in the DigaSystem database.

Sometimes it is not useful to overtake the original timestamp.

Therefore you can add the string [DATE][TIME] to the static metadata of DigaPorter.

This will result that the original values are not used. Instead of this the current date and time will be used.