[Findit] Implement retry within swarming_util.py when making server calls

appengine/findit/waterfall/test/wf_testcase.py

Index: appengine/findit/waterfall/test/wf_testcase.py
diff --git a/appengine/findit/waterfall/test/wf_testcase.py b/appengine/findit/waterfall/test/wf_testcase.py
index 98e4f5434b926e7044f2f3d36fae5b7ceab216bd..083a8138f6b726d974e33d5472d4956d1ff85af2 100644
--- a/appengine/findit/waterfall/test/wf_testcase.py
+++ b/appengine/findit/waterfall/test/wf_testcase.py
@@ -93,6 +93,9 @@ _DEFAULT_SWARMING_SETTINGS = {
     'iterations_to_rerun': 10,
     'get_swarming_task_id_timeout_seconds': 5 * 60,  # 5 minutes.
     'get_swarming_task_id_wait_seconds': 10,
+    'server_retry_timeout': 24 * 60 * 60,  # 24 hours.
+    'maximum_server_contact_retry_interval_seconds': 5 * 60,  # 5 minutes.
+    'should_retry_server': False,  # No retry for unit testing.
 }