Stop notifying nodepool on log config changes

Previously puppet would restart nodepool whenever the nodepool log
config changes. This is problematic because nodepool will try to do a
graceful shutdown which can take hours. During this time period no new
nodes are built. Stop doing this and rely on manual nodepool restarts
(which is status quo for any other nodepool changes).

Change-Id: I522070df96d4e455a2c478bcf832ae6bb8729bf2
Merge "Stop notifying nodepool on log config changes"