policy_WiFiPrecedenceServer.device_vs_user: disable test

This test is failing on the majority of its runs.
Disable it until it can be fixed.

BUG=b:171583865
TEST=none

Change-Id: I41cbdfacdb913300e3162be266463ae65a21e08a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2495572
Tested-by: Ross Zwisler <zwisler@google.com>
Auto-Submit: Ross Zwisler <zwisler@google.com>
Reviewed-by: Harpreet Grewal <harpreet@chromium.org>
Commit-Queue: Harpreet Grewal <harpreet@chromium.org>
diff --git a/server/site_tests/policy_WiFiPrecedenceServer/control.device_vs_user b/server/site_tests/policy_WiFiPrecedenceServer/control.device_vs_user
index b6f9849..9c425a7 100644
--- a/server/site_tests/policy_WiFiPrecedenceServer/control.device_vs_user
+++ b/server/site_tests/policy_WiFiPrecedenceServer/control.device_vs_user
@@ -6,7 +6,8 @@
 TIME = 'SHORT'
 NAME = 'policy_WiFiPrecedenceServer.device_vs_user'
 TEST_TYPE = 'Server'
-ATTRIBUTES = 'suite:ent-wificell'
+# Disable this test until it can be fixed: http://b/171583865
+# ATTRIBUTES = 'suite:ent-wificell'
 DEPENDENCIES = 'wificell'
 
 DOC = """