merge with master

charts/postgres-operator-ui/templates/deployment.yaml

charts/postgres-operator-ui/templates/ingress.yaml

charts/postgres-operator-ui/templates/service.yaml

charts/postgres-operator-ui/templates/serviceaccount.yaml

charts/postgres-operator/crds/operatorconfigurations.yaml

charts/postgres-operator/crds/postgresqls.yaml

charts/postgres-operator/templates/configmap.yaml

charts/postgres-operator/templates/deployment.yaml

...ts/postgres-operator/templates/operatorconfiguration.yaml

...tgres-operator/templates/postgres-pod-priority-class.yaml

charts/postgres-operator/templates/service.yaml

charts/postgres-operator/templates/serviceaccount.yaml

charts/postgres-operator/values.yaml

docs/quickstart.md

docs/reference/operator_parameters.md

docs/user.md

e2e/tests/k8s_api.py

e2e/tests/test_e2e.py

manifests/complete-postgres-manifest.yaml

manifests/configmap.yaml