[Findit] Adding support for disabling test try jobs for given master/builder

appengine/findit/waterfall/waterfall_config.py

Index: appengine/findit/waterfall/waterfall_config.py
diff --git a/appengine/findit/waterfall/waterfall_config.py b/appengine/findit/waterfall/waterfall_config.py
index 6fb5ee1fe7da166c8ba54242b31873326e02809b..57c31c8dabc45966ae3d35146713189cd49d797b 100644
--- a/appengine/findit/waterfall/waterfall_config.py
+++ b/appengine/findit/waterfall/waterfall_config.py
@@ -137,6 +137,24 @@ def EnableStrictRegexForCompileLinkFailures(wf_mastername, wf_buildername):
   return trybot_config.get('strict_regex', False)
 
 
+def EnableTestTryJobs(wf_mastername, wf_buildername):
+  """Returns True if test try jobs should be triggered.
+
+    By default, test try jobs should be supported unless the master/builder
+    specifies to bail out.
+
+  Args:
+    wf_mastername: The mastername of a waterfall builder.
+    wf_buildername: The buildername of a waterfall builder.
+
+  Returns:
+    True if test try jobs are supported, False otherwise.
+  """
+  trybot_config = FinditConfig.Get().builders_to_trybots.get(
+      wf_mastername, {}).get(wf_buildername, {})
+  return trybot_config.get('enable_tests', True)
+
+
 def GetTryJobSettings():
   return FinditConfig().Get().try_job_settings