Use unknown model.

Bug: 27383791
Change-Id: I8e29a599cb3f114c68a85bf45480a245053cf6ee
diff --git a/base_product/weaved.conf b/base_product/weaved.conf
index 864dafd..befeaab 100644
--- a/base_product/weaved.conf
+++ b/base_product/weaved.conf
@@ -42,7 +42,7 @@
 
 # Five character code assigned by the cloud registry of device models.
 # Defaults to "AAAAA" (Unregistered model).
-model_id=ABCDE
+model_id=AAAAA
 
 # Maximum role for local anonymous user.
 # local_anonymous_access_role=viewer