The current copyright refers to a non-existent group
"openstack helm authors" with often out-of-date references that
are confusing when adding a new file to the repo.
This change removes all references to this copyright by the
non-existent group and any blank lines underneath.
Change-Id: I1882738cf9757c5350a8533876fd37b5920b5235
This PS allows to set collectors enable/disable using values.
_node-exporter.sh.tpl makes collectors-list from values.yaml.
Change-Id: Iba2cf4d8304f2405db394fbb6fee58119eab13fc