Add an initial support for a connection pooler. The idea is to make it
generic enough to be able to switch a corresponding docker image to
change from pgbouncer to e.g. odyssey. Operator needs to create a
deployment with pooler and a service for it to access.
* align config map, operator config, helm chart values and templates
* follow helm chart conventions also in CRD templates
* split up values files and add comments
* avoid yaml confusion in postgres manifests
* bump spilo version and use example for logical_backup_s3_bucket
* add ConfigTarget switch to values
* Minor improvements
* Document empty list vs null for users without privileges
* Change the wording for null values
* Add talk by Oleksii in Atmosphere
removing parts of config.
* chaning secret name pattern to make things shorter.
* Move section on self building docker image.
* Fix typo.
* Bump image.
* bump version for pdb fix.
* Changes in regards to review.
* Fix xhyve driver link.
* Move to new api, remove service account, not needed for minikube.
* Changed minimal manifest and example to use right file.
* Added service account for operator again, it is needed in pods anyways later.
Dmitrii Dolgov
Felix Kunde
Sergey Dudoladov
Jan Mussler