Enable desktopui_PyAutoEnduranceTests in the autotest lab and on the results dashboard.

BUG=chromium-os:21881
TEST=None

Change-Id: I199b296eba9774696be1a1aa248bf863b201627a
Reviewed-on: https://gerrit.chromium.org/gerrit/25155
Reviewed-by: Scott Zawalski <scottz@chromium.org>
Commit-Ready: Dennis Jeffrey <dennisjeffrey@chromium.org>
Tested-by: Dennis Jeffrey <dennisjeffrey@chromium.org>
diff --git a/suite_scheduler.ini b/suite_scheduler.ini
index c4451e8..8469487 100644
--- a/suite_scheduler.ini
+++ b/suite_scheduler.ini
@@ -146,6 +146,12 @@
 branch_specs: >=R21
 pool: suites
 
+[pyauto_endurance]
+run_on: nightly
+suite: pyauto_endurance
+branch_specs: >=R21
+pool: lumpy-celeron
+
 [pyauto_basic]
 run_on: new_build
 suite: pyauto_basic