CBQE-1069: print status scheduler if upgrade failed

Change-Id: Iae27d3f183cdf1889da38e2fb384ade92898bd49
Reviewed-on: http://review.couchbase.org/25085
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>