added required packages installation and use official golang download url
added required packages installation and use official golang download url

manuelkasiske/openshift-golang-template,manuelkasiske/openshift-golang-template,korasdor/openshift-golang-template,manuelkasiske/openshift-golang-template,amsokol/openshift-golang-template,manuelkasiske/openshift-golang-template,korasdor/openshift-golang-template,amsokol/openshift-golang-template