updated maven pom to use repo.jenkins-ci.org repository
updated maven pom to use repo.jenkins-ci.org repository

opencloud/ivy-plugin,jenkinsci/ivy-plugin,jenkinsci/ivy-plugin,anastasiyam/ivy-plugin,anastasiyam/ivy-plugin,burghduffkc/ivy-plugin,arothian/ivy-plugin,arothian/ivy-plugin,burghduffkc/ivy-plugin,opencloud/ivy-plugin