CBD-1205:  don't fail on a virgin environment

Change-Id: I7decc495d8ad4df4bb3e6e3faba91e366f43f388
Reviewed-on: http://review.couchbase.org/32580
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>