rebaseline_server: include setA/setB descriptions in output JSON

gm/rebaseline_server/compare_rendered_pictures_test.py

Index: gm/rebaseline_server/compare_rendered_pictures_test.py
diff --git a/gm/rebaseline_server/compare_rendered_pictures_test.py b/gm/rebaseline_server/compare_rendered_pictures_test.py
index 6a057d29429c76967cf0d1e8744b4588fb7ad2f4..c8f47e35f1cbfc401da72aa6fae9af451d31521c 100755
--- a/gm/rebaseline_server/compare_rendered_pictures_test.py
+++ b/gm/rebaseline_server/compare_rendered_pictures_test.py
@@ -65,6 +65,14 @@ class CompareRenderedPicturesTest(base_unittest.TestCase):
         diff_base_url='/static/generated-images')
     results_obj.get_timestamp = mock_get_timestamp
 
+    # Overwrite elements within the results that change from one test run
+    # to the next.
+    # pylint: disable=W0212
+    results_obj._setA_descriptions[results.KEY__SET_DESCRIPTIONS__DIR] = [
+        'before-patch-fake-dir']
+    results_obj._setB_descriptions[results.KEY__SET_DESCRIPTIONS__DIR] = [
+        'after-patch-fake-dir']
+
     gm_json.WriteToFile(
         results_obj.get_packaged_results_of_type(
             results.KEY__HEADER__RESULTS_ALL),
@@ -83,6 +91,14 @@ class CompareRenderedPicturesTest(base_unittest.TestCase):
         diff_base_url='/static/generated-images')
     results_obj.get_timestamp = mock_get_timestamp
 
+    # Overwrite elements within the results that change from one test run
+    # to the next.
+    # pylint: disable=W0212
+    results_obj._setA_descriptions\
+        [results.KEY__SET_DESCRIPTIONS__REPO_REVISION] = 'fake-repo-revision'
+    results_obj._setB_descriptions\
+        [results.KEY__SET_DESCRIPTIONS__REPO_REVISION] = 'fake-repo-revision'
+
     gm_json.WriteToFile(
         results_obj.get_packaged_results_of_type(
             results.KEY__HEADER__RESULTS_ALL),