statjson use ENVIRONMENT_PROD as environment

BUG=chromium:983190
TEST=None

Change-Id: I8107253fac1448cdda31a6f4d831f1fb9c610b86
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/1699364
Reviewed-by: Gregory Nisbet <gregorynisbet@google.com>
Commit-Queue: Gregory Nisbet <gregorynisbet@google.com>
Tested-by: Gregory Nisbet <gregorynisbet@google.com>
Auto-Submit: Gregory Nisbet <gregorynisbet@google.com>
diff --git a/cli/host.py b/cli/host.py
index 93a5d88..62c6f10 100644
--- a/cli/host.py
+++ b/cli/host.py
@@ -370,7 +370,7 @@
             skylab_json = {
                 "common": {
                     "attributes": attrs,
-                    "environment": "ENVIRONMENT_STAGING",
+                    "environment": "ENVIRONMENT_PROD",
                     "hostname": stats_map["hostname"],
                     "id": ID_AUTOGEN_MESSAGE,
                     "labels": out_labels,