"Output file" parameter for classification elements

Add a new "Output file" parameter to the following elements:

• "Classify sequences with Kraken"
• "Classify sequences with CLARK"
• "Classify sequences with DIAMOND"

The parameter description should be the following:

Specify the output file name.

In GUI it should be a line edit with the browse button. The value is mandatory ("Required"). By default, the names are generated from the input file name like that:

• input file name_Kraken_classification.txt
• input file name_CLARK_classification.csv
• input file name_DIAMOND_classification.txt

The data are stored in the workflow output folder by default.