update getting started with release build section
update getting started with release build section

hawkular/hawkular-metrics,mwringe/hawkular-metrics,jotak/hawkular-metrics,mwringe/hawkular-metrics,jotak/hawkular-metrics,hawkular/hawkular-metrics,jotak/hawkular-metrics,burmanm/hawkular-metrics,mwringe/hawkular-metrics,jotak/hawkular-metrics,hawkular/hawkular-metrics,mwringe/hawkular-metrics,burmanm/hawkular-metrics,burmanm/hawkular-metrics,hawkular/hawkular-metrics,burmanm/hawkular-metrics