Change task timeout limit to 3 days

As ChromeOS CTS/GTS qualification suite may take at most 2 days to
complete, change the swarming client task timeout limit from 1 day to 3
days.

Relavent discussion:
https://groups.google.com/a/google.com/forum/?utm_medium=email&utm_source=footer#!msg/chromeos-infra-discuss/AOQP2CD90oE/sc3D1jm_AAAJ

R=vadimsh@chromium.org
BUG=746327

Review-Url: https://codereview.chromium.org/2984773002

appengine/swarming/server/task_request.py

@@ -75,8 +75,8 @@
 MAXIMUM_PRIORITY = 255
 
 
-# One day in seconds. Add 10s to account for small jitter.
-_ONE_DAY_SECS = 24*60*60 + 10
+# Three days in seconds. Add 10s to account for small jitter.
+_THREE_DAY_SECS = 3*24*60*60 + 10
 
 
 # Seven day in seconds. Add 10s to account for small jitter.
@@ -227,10 +227,10 @@ def _validate_task_run_id(_prop, value):
 
 def _validate_timeout(prop, value):
   """Validates timeouts in seconds in TaskProperties."""
-  if value and not (_MIN_TIMEOUT_SECS <= value <= _ONE_DAY_SECS):
+  if value and not (_MIN_TIMEOUT_SECS <= value <= _THREE_DAY_SECS):
     # pylint: disable=W0212
     raise datastore_errors.BadValueError(
-        '%s (%ds) must be 0 or between %ds and one day' %
+        '%s (%ds) must be 0 or between %ds and three days' %
             (prop._name, value, _MIN_TIMEOUT_SECS))
 
 

appengine/swarming/server/task_request_test.py

@@ -570,9 +570,10 @@ def mkcipdreq(idempotent=False, **cipd_input):
     # Execution timeout.
     with self.assertRaises(datastore_errors.BadValueError):
       mkreq(_gen_request(
-          properties=dict(execution_timeout_secs=task_request._ONE_DAY_SECS+1)))
+          properties=dict(
+              execution_timeout_secs=task_request._THREE_DAY_SECS+1)))
     mkreq(_gen_request(
-        properties=dict(execution_timeout_secs=task_request._ONE_DAY_SECS)))
+        properties=dict(execution_timeout_secs=task_request._THREE_DAY_SECS)))
 
     # Expiration.
     now = utils.utcnow()