Fix an error on cloning kubenetes repo
Fix an error on cloning kubenetes repo

By following the quickstart guide, the step of cloning the kubenetes
repo will fail. This is due to the target directory has already been
deployed. This patch removes the unnecessary repo cloning.

Change-Id: I919f0bd17112cf8238a3fc599f3991fd5c569999
Closes-Bug: 1426972

sajuptpm/magnum,hongbin/magnum,paulczar/magnum,ramielrowe/magnum,Alzon/SUR,ffantast/magnum,openstack/magnum,sajuptpm/magnum,annegentle/magnum,ffantast/magnum,Tennyson53/SUR,Tennyson53/SUR,paulczar/magnum,jay-lau/magnum,eshijia/SUR,ArchiFleKs/magnum,hongbin/magnum,eshijia/SUR,openstack/magnum,LaynePeng/magnum,LaynePeng/magnum,ddepaoli3/magnum,Tennyson53/magnum,mjbrewer/testindex,ChengTiesheng/magnum,ramielrowe/magnum,eshijia/magnum,annegentle/magnum,dimtruck/magnum,Alzon/SUR,ChengTiesheng/magnum,dimtruck/magnum,mjbrewer/testindex,mjbrewer/testindex,ddepaoli3/magnum,Tennyson53/magnum,ArchiFleKs/magnum,eshijia/magnum