Remove handle_entity_children for convert xml
Remove handle_entity_children for convert xml

- handle_entity_children performs the same function as convert_mapping_to_xml

Change-Id: I8bed98e1e260d93fe06fac990f43fd62e9ac4934
Signed-off-by: Kien Ha <3e36ebd6a7c89ee7d9a20a5fbbffc571f107e566@gmail.com>

puppetlabs/jenkins-job-builder,wsoula/jenkins-job-builder,tamac-io/jenkins-job-builder,phinexus/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,twc-openstack/jenkins-job-builder,dataxu/jenkins-job-builder,wsoula/jenkins-job-builder,dataxu/jenkins-job-builder,onshape/jenkins-job-builder,tamac-io/jenkins-job-builder,twc-openstack/jenkins-job-builder,phinexus/jenkins-job-builder,gforcada/jenkins-job-builder,onshape/jenkins-job-builder,rsig/jenkins-job-builder,gforcada/jenkins-job-builder,phinexus/jenkins-job-builder,OSSystems/jenkins-job-builder,tamac-io/jenkins-job-builder,gforcada/jenkins-job-builder,rsig/jenkins-job-builder,twc-openstack/jenkins-job-builder,dataxu/jenkins-job-builder,rsig/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,tamac-io/jenkins-job-builder,phinexus/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,puppetlabs/jenkins-job-builder,wikimedia/integration-jenkins-job-builder,dataxu/jenkins-job-builder,phinexus/jenkins-job-builder,OSSystems/jenkins-job-builder,gforcada/jenkins-job-builder,OSSystems/jenkins-job-builder,onshape/jenkins-job-builder,puppetlabs/jenkins-job-builder,twc-openstack/jenkins-job-builder,wsoula/jenkins-job-builder,wsoula/jenkins-job-builder,onshape/jenkins-job-builder,OSSystems/jenkins-job-builder,gforcada/jenkins-job-builder,puppetlabs/jenkins-job-builder,rsig/jenkins-job-builder,wikimedia/integration-jenkins-job-builder