Recipe package system.

recipe_modules/step/example.expected/invalid_access.json

 [
   {
     "cmd": [
       "echo",
       "Hello World"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "hello"
   },
   {
@@ skipping 43 matching lines @@
     "cmd": [
       "echo",
       "goodbye"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "goodbye (2)"
   },
   {
     "cmd": [
       "echo",
+      "warning"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "warning"
+  },
+  {
+    "cmd": [
+      "echo",
       "testa"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "testa"
   },
   {
     "cmd": [
       "echo",
       "testb"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "testb"
   },
   {
     "cmd": [
       "echo",
       "cleaning",
       "up",
       "build"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "cleanup"
   },
   {
     "cmd": [
       "python",
-      "test-wrapper.py",
-      "-v",
-      "--",
+      "-c",
+      "import sys; print sys.argv",
       "echo",
       "main",
       "application"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "application"
   },
   {
     "cmd": [
       "echo",
       "I",
       "do",
       "nothing"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "no-op"
   },
   {
     "name": "$final_result",
     "reason": "Invalid Step Data Access: StepDataAttributeError('The recipe attempted to access missing step data \"json\" for step \"no-op\". Please examine that step for errors.',)",
     "status_code": -1
   }
-]
+]