fix failing tests

Author: mr-c

draft-4/conformance_test_draft-4.yaml

@@ -60,6 +60,12 @@
 - job: draft-4/cat-job.json
   tool: draft-4/cat3-tool-shortcut.cwl
   doc: Test command execution in Docker with stdout redirection
+  output:
+    output_file:
+      class: File
+      checksum: sha1$47a013e660d408619d894b20806b1d5086aab03b
+      path: Any
+      size: 13
 
 - job: draft-4/cat-job.json
   output:
@@ -76,11 +82,23 @@
   job:
   tool: draft-4/egrep-stderr.cwl
   doc: Test command line with stderr redirection
+  output:
+    output_file:
+      class: File
+      checksum: sha1$cec7b8746a78c42060c96505887449bca0142976
+      size: 84
+      path: error.txt
 
 - args: [egrep]
   job:
   tool: draft-4/egrep-stderr-shortcut.cwl
   doc: Test command line with stderr redirection, brief syntax
+  output:
+    output_file:
+      class: File
+      checksum: sha1$cec7b8746a78c42060c96505887449bca0142976
+      size: 84
+      path: Any
 
 - args: [egrep]
   stderr: std.err