* Rename from community.kubernetes to kubernetes.core
This goes through and renames community.kubernetes to kubernetes.core.
Most of this was generated from the downstream build script that was
used on the community repository, plus whatever hand edits I could find
that were needed.
The downstream build and test process has also been removed as this
repository is now the downstream repository.
* Fix CONTRIBUTING.md
When adding a Secret and using stringData, check_mode will always show
changes. An existing resource fetched from Kubernetes will have the
stringData already base64 encoded and merged into the data attribute.
This change performs the base64 encoding and merging with the provided
definition to more accurately represent the current state of the
cluster.
This change only affects check_mode. When making any changes to the
cluster the stringData is passed along as provided in the definition.
Closes#282.