feat: configurable @url@ timeout

mentioned in commit ff92a390

mentioned in merge request to-be-continuous/samples/golang-cnb-helm-on-kubernetes!78 (merged)

mentioned in merge request to-be-continuous/samples/golang-cnb-on-kubernetes!76 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-openshift!95 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-gcloud!150 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!150 (merged)

mentioned in merge request to-be-continuous/samples/freepascal-make-helm!53 (merged)

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!129