Refactor expectations of properties recipe_module.

recipe_modules/properties/example.expected/buildbot_generic.json

 [
   {
     "cmd": [
       "echo",
       "None",
       "'thing'"
     ],
     "name": "echo"
   },
   {
     "cmd": [
       "echo",
-      "[('blamelist', ['cool_dev1337@chromium.org', 'hax@chromium.org']), ('buildbotURL', 'http://c.org/p/cr/'), ('buildername', 'TestBuilder'), ('buildnumber', 571), ('foo.bar-bam', 'thing'), ('mastername', 'chromium.testing.master'), ('recipe', 'properties:example'), ('slavename', 'TestSlavename'), ('test_prop', None), ('workdir', '/path/to/workdir/TestSlavename')]"
+      "('blamelist', ['cool_dev1337@chromium.org', 'hax@chromium.org'])",
+      "('buildbotURL', 'http://c.org/p/cr/')",
+      "('buildername', 'TestBuilder')",
+      "('buildnumber', 571)",
+      "('foo.bar-bam', 'thing')",
+      "('mastername', 'chromium.testing.master')",
+      "('recipe', 'properties:example')",
+      "('slavename', 'TestSlavename')",
+      "('test_prop', None)",
+      "('workdir', '/path/to/workdir/TestSlavename')"
     ],
     "name": "echo all"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]