update config to not have local step.

workflow/conf/biohpc.config

@@ -21,7 +21,7 @@ process {
   }
   $experimentQC {
     module = ['python/3.6.1-2-anaconda', 'deeptools/2.5.0.1']
-    executor = 'local'
+    cpus = 32
   }
   $convertReads {
     module = ['python/3.6.1-2-anaconda',  'samtools/1.4.1', 'bedtools/2.26.0']