[autotest] Disable incremental updating of TKO from server job.

This is meant for long running tests so that one can see progress from a
frontend, but we've never used this feature, and it's costing us mysql
connections, load, and now bugs.

BUG=chromium:385232
TEST=test_that ran fine

Change-Id: I689ae7c184d8bc6ea3b5f755150906e5031885a8
Reviewed-on: https://chromium-review.googlesource.com/205133
Reviewed-by: Prashanth B <beeps@chromium.org>
Tested-by: Alex Miller <milleral@chromium.org>
Commit-Queue: Alex Miller <milleral@chromium.org>
diff --git a/global_config.ini b/global_config.ini
index 7c8348d..e6d9876 100644
--- a/global_config.ini
+++ b/global_config.ini
@@ -36,6 +36,8 @@
 client_autodir_paths: /usr/local/autotest
 # White list of tests with run time measurement enabled.
 measure_run_time_tests: desktopui_ScreenLocker,login_LoginSuccess,security_ProfilePermissions
+# Incrementally update TKO with the status as the test runs.
+incremental_tko_parsing: False
 
 [CLIENT]
 drop_caches: False