Instead of sourcing heat-params in script, we can use it as a systemd
unit EnvironmentFile directive and not inline in sh scripts.
Change-Id: I3ebf23dee6785febdc87bc5ce4212c30ef24806e
Since we have seperate template files to different driver directory, we
can cleanup -coreos suffix from template.
1. Remove unused shell scripts.
2. Remove kube-examples.yaml and kube-user.yaml which is never used.
Closes-bug: #1606655
Change-Id: I6ac93ad23e7ae30ad1eb9be1c79c2cf36af8db0c