* Grafana v7.0 changelog update

* enterprise changelog

* docs: white-labeling login title and subtitle

* Add backend plugins breaking change regarding plugin signing

* Update CHANGELOG.md

Co-authored-by: Kyle Brandt <kyle@grafana.com>

* Update docs/sources/installation/upgrading.md

Co-authored-by: Kyle Brandt <kyle@grafana.com>

* Update docs/sources/installation/upgrading.md

Co-authored-by: Leonard Gram <leo@xlson.com>
Co-authored-by: Kyle Brandt <kyle@grafana.com>