test: Use asset samplesheet during dev

conf/test.config

@@ -23,7 +23,7 @@ params {
   //input_paths = [
   //  ['SRR4292758_00', ['https://github.com/nf-core/test-datasets/raw/hic/data/SRR4292758_00_R1.fastq.gz', 'https://github.com/nf-core/test-datasets/raw/hic/data/SRR4292758_00_R2.fastq.gz']]
   // ]
-  input = '/home/nservant/tmp/nf-core-hic/samplesheet.csv'
+  input = "${baseDir}/assets/samplesheet.csv"
 
   // Annotations
   fasta = 'https://github.com/nf-core/test-datasets/raw/hic/reference/W303_SGD_2015_JRIU00000000.fsa'