CBLT-327:  remove DEBUG output

Problem is we use uname to get platfrom, but are actually parsing
the hostname.  So we should always pass in the OS parameter.

Change-Id: I3f926fdce80041f79a1d11c93bf99ec5ba477987
Reviewed-on: http://review.couchbase.org/40585
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>