CBLT-198:  set param values in POST job

Change-Id: I57dcfb4ea88f0acd4f65618383c3f93cfb8b08c9
Reviewed-on: http://review.couchbase.org/34132
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>