improvements and refactor

[eguzki]

• Upgrade operator-sdk 1.6.1
  • sigs.k8s.io/controller-runtime v0.7.2
  • k8s.io/api v0.19.2
  • k8s.io/apimachinery v0.19.2
• Makefile local-* targets for dev purposes (deploy locally in kind)

make help

Usage:
  make <target>

General
  help             Display this help.

Development
  manifests        Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
  generate         Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
  fmt              Run go fmt against code.
  vet              Run go vet against code.
  test             Run tests.

Build
  build            Build manager binary.
  run              Run a controller from your host.
  docker-build     Build docker image with the manager.
  docker-push      Push docker image with the manager.

Deployment
  install          Install CRDs into the K8s cluster specified in ~/.kube/config.
  uninstall        Uninstall CRDs from the K8s cluster specified in ~/.kube/config.
  deploy           Deploy controller to the K8s cluster specified in ~/.kube/config.
  undeploy         Undeploy controller from the K8s cluster specified in ~/.kube/config.
  controller-gen   Download controller-gen locally if necessary.
  kustomize        Download kustomize locally if necessary.
  kind             Download kind locally if necessary
  local-setup      Deploy operator in local kind cluster
  local-dev-setup  Run operator locally in local kind cluster
  local-cleanup    Clean up local kind cluster
  local-setup-kind  Create kind cluster
  bundle           Generate bundle manifests and metadata, then validate generated files.
  bundle-build     Build the bundle image.
  bundle-push      Push the bundle image.
  opm              Download opm locally if necessary.
  catalog-build    Build a catalog image.
  catalog-push     Push a catalog image.

• Add custom http Transport to debug HTTP requests and responses (conversation between controller and Limitador admin API)
• Use BaseReconcilers for all the controllers.