add/update <url> value in some plugin poms
add/update <url> value in some plugin poms

daniel-beck/groovy-plugin,ndeloof/groovy-plugin,daniel-beck/groovy-plugin,vjuranek/groovy-plugin,jenkinsci/groovy-plugin,daniel-beck/groovy-plugin,jenkinsci/groovy-plugin,jenkinsci/groovy-plugin,hudson3-plugins/groovy-plugin,vjuranek/groovy-plugin