[CORE] illuminafilter is executed on wrong data

Illuminafilter process must not be executed on multiplexed NovaSeq data, but is currently done !
The test bellow does not works :

if (params.sequencer == 'NovaSeq' & params.is_multiplex == true) {
    System.out.println "Les données ne nécessite pas de passer par IlluminaFilter"
    ch_read_good = ch_read
} else {	// Si MiSeq ou Nova + noIndex
    illuminaFilter(ch_read)
    ch_read_good = illuminaFilter.out.reads
}