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

ntabernero/chucknorris-plugin,mi-schi/denglish-jenkins-plugin,ntabernero/chucknorris-plugin,ymajoros/grandjojo-plugin,jenkinsci/chucknorris-plugin,jenkinsci/chucknorris-plugin