CBQE-0: couchbase_uninstall with more logs for windows

Change-Id: Ia0357c7f568d5f36b349ef82c0e72aa53fd0cd28
Reviewed-on: http://review.couchbase.org/27105
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>