make test data larger to include peaks and motifs

[sreichl]

so that the whole workflow can be tested using the test data

something like this
If working with FASTQ data, a straightforward way
to generate a small test set is to subsample the first million lines of a file (first 250,000 reads) as follows: head -n 1000000 FASTQ FILE.fq > test fastq.fq

or just sampling more reads

[sreichl]

could be obsolete once the ATAC-seq RECIPE is provided.