Update config to use executor instead of cpu in config file.

workflow/conf/biohpc.config

@@ -45,7 +45,7 @@ process {
   }
   $consensusPeaks {
     module = ['python/3.6.1-2-anaconda', 'bedtools/2.26.0']
-    cpus = 'local'
+    executor = 'local'
   }
 }