Stop creating kubectl binary on undercloud
Stop creating kubectl binary on undercloud

Doing this was useful for playing with Kubespray, but it's suboptimal
for multiple reasons:

1. It gets generated into artifacts directory which we collect for CI
   logs. It has around 220 megabytes, which would be very bad for log
   collection space usage. Even if Kubespray made the location
   configurable, mistral user's external_deploy_tasks don't have
   rights to write it e.g. into /usr/local/bin, so usefulness of doing
   this at all is questionable.

2. Kubectl on the undercloud, it would ideally be preinstalled via
   RPMs rather than relying on the respective COE installers to
   produce one by fetching it from the overcloud.

Change-Id: Ia7faeb13537adfc3326302d26965439f5603c5a8

openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates