Update nodejs_installator to use convert_xml()
Update nodejs_installator to use convert_xml()

Change-Id: I9ff0dc656fe285c56bc2dddcc08de95582cee4b1

OSSystems/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,phinexus/jenkins-job-builder,rsig/jenkins-job-builder,gforcada/jenkins-job-builder,puppetlabs/jenkins-job-builder,wsoula/jenkins-job-builder,puppetlabs/jenkins-job-builder,OSSystems/jenkins-job-builder,wsoula/jenkins-job-builder,OSSystems/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,gforcada/jenkins-job-builder,gforcada/jenkins-job-builder,rsig/jenkins-job-builder,phinexus/jenkins-job-builder,phinexus/jenkins-job-builder,wsoula/jenkins-job-builder,puppetlabs/jenkins-job-builder,gforcada/jenkins-job-builder,gforcada/jenkins-job-builder,phinexus/jenkins-job-builder,rsig/jenkins-job-builder,rsig/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,wsoula/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,wikimedia/integration-jenkins-job-builder,phinexus/jenkins-job-builder,puppetlabs/jenkins-job-builder,OSSystems/jenkins-job-builder