Adjust core request in bwa command line test from 4 to 2.

Author: Peter Amstutz

v1.0/conformance_test_v1.0.yaml

@@ -1,7 +1,7 @@
 - job: v1.0/bwa-mem-job.json
   tool: v1.0/bwa-mem-tool.cwl
   output:
-    args: [bwa, mem, -t, '4', -I, '1,2,3,4', -m, '3',
+    args: [bwa, mem, -t, '2', -I, '1,2,3,4', -m, '3',
       chr20.fa,
       example_human_Illumina.pe_1.fastq,
       example_human_Illumina.pe_2.fastq]

v1.0/v1.0/bwa-mem-tool.cwl

@@ -6,7 +6,7 @@ class: CommandLineTool
 
 hints:
   - class: ResourceRequirement
-    coresMin: 4
+    coresMin: 2
   - class: DockerRequirement
     dockerPull: python:2-slim