[autotest] Move min_version_support_ssp check to global config.

For lab, the minimum version of CrOS build to support ssp should be 6986,
which includes following two CLs:
https://chromium-review.googlesource.com/#/c/266170/
https://chromium-review.googlesource.com/#/c/266128/

For moblab, the version is lowered to original setting, 6919, so moblab can
still test builds from R43 branch, except that it can't run paygen_au_canary
and moblab_RunSuite suites.

BUG=chromium:473970
TEST=local run_suite
./site_utils/run_suite.py --build peppy-release/R44-6983.0.0 --suite_name dummy_server --board peppy

Change-Id: I6a9096d3f5b00b554c06d4c8022d8a8f4a6bd7df
Reviewed-on: https://chromium-review.googlesource.com/266262
Trybot-Ready: Dan Shi <dshi@chromium.org>
Tested-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
diff --git a/global_config.ini b/global_config.ini
index 80f3347..5ae6840 100644
--- a/global_config.ini
+++ b/global_config.ini
@@ -74,6 +74,11 @@
 # TODO(dshi): Change this to True after SSP via container is rolled out.
 enable_ssp_container: False
 
+# Minimum OS version that supports server side packaging. Older builds may
+# not have server side package built or with Autotest code change to support
+# server-side packaging.
+min_version_support_ssp: 6986
+
 [CLIENT]
 drop_caches: False
 drop_caches_between_iterations: False