rbenv: Utilize convert_mapping_to_xml
rbenv: Utilize convert_mapping_to_xml

Change-Id: I8da4a843f18aa3c845f4c15cc9ecd346c2c69498
Signed-off-by: Tan Heng Yeow <e823c569ecd97d7c59d0e90eefc0aeb98a922c4d@u.nus.edu>

gforcada/jenkins-job-builder,wsoula/jenkins-job-builder,gforcada/jenkins-job-builder,puppetlabs/jenkins-job-builder,wsoula/jenkins-job-builder,puppetlabs/jenkins-job-builder,puppetlabs/jenkins-job-builder,gforcada/jenkins-job-builder,gforcada/jenkins-job-builder,wsoula/jenkins-job-builder,wsoula/jenkins-job-builder,gforcada/jenkins-job-builder,puppetlabs/jenkins-job-builder