[Findit] Fix Key error in build_failure handler.

appengine/findit/handlers/test/build_failure_test.py

Index: appengine/findit/handlers/test/build_failure_test.py
diff --git a/appengine/findit/handlers/test/build_failure_test.py b/appengine/findit/handlers/test/build_failure_test.py
index 6c664eff73e2239dad7840d722b92ebcbc69501f..a310c39dbeb96047ec64e4018e78b275fc634dc1 100644
--- a/appengine/findit/handlers/test/build_failure_test.py
+++ b/appengine/findit/handlers/test/build_failure_test.py
@@ -74,6 +74,13 @@ SAMPLE_TRY_JOB_INFO = {
                     'task_id': 'task2',
                     'task_url': 'url/task2',
                     'tests': ['test1']
+                },
+                {
+                    'ref_name': 'step1',
+                    'try_job_key': 'm/b/120',
+                    'task_id': 'task2',
+                    'task_url': 'url/task2',
+                    'tests': ['test5']
                 }
             ]
         }
@@ -407,7 +414,7 @@ class BuildFailureTest(wf_testcase.WaterfallTestCase):
                 'last_pass': 119,
                 'supported': True,
                 'suspected_cls': [],
-                'tests': ['test1']
+                'tests': ['test1', 'test5']
             }
         ]
     }
@@ -518,6 +525,23 @@ class BuildFailureTest(wf_testcase.WaterfallTestCase):
                         'try_job':{
                             'ref_name': 'step1',
                             'try_job_key': 'm/b/120',
+                            'status': result_status.UNKNOWN,
+                            'task_id': 'task2',
+                            'task_url': 'url/task2',
+                            'tests': ['test5']
+                        },
+                        'heuristic_analysis': {
+                            'suspected_cls': []
+                        },
+                        'tests': ['test5'],
+                        'first_failure': 120,
+                        'last_pass': 119,
+                        'supported': True
+                    },
+                    {
+                        'try_job':{
+                            'ref_name': 'step1',
+                            'try_job_key': 'm/b/120',
                             'status': result_status.NO_TRY_JOB_REASON_MAP[
                                 analysis_status.PENDING],
                             'task_id': 'task2',