CBLT-198:  set param values in build_sync_master_POST job

Change-Id: Ie6ab27e924be1af22686030236b252ae7c892a90
Reviewed-on: http://review.couchbase.org/34133
Reviewed-by: Philip Labee <philip@couchbase.com>
Tested-by: Philip Labee <philip@couchbase.com>