K8s-02 and K8s-03 test procedures added

### \[K8s-02\] Register and de-register Kubernetes clusters in OSM

TODO: Under ellaboration. Register and de-register pre-existing K8s clusters in OSM.

1. Register the Kubernetes cluster in OSM

   ```bash

   osm k8scluster-add --creds <KUBECONFIG_FILE> --version v1 --vim <VIM_NAME> --k8s-nets '{"net1": <VIM_MGMT_NETWORK>}' --description "K8s cluster" osm-k8s-cluster

   ```

2. Check that the Kubernetes cluster is successully added

   ```bash

   # Get all k8sclusters. The Operational State of the cluster should be "ENABLED"

   osm k8scluster-list

   ```

3. De-register the Kubernetes cluster

   ```bash

   osm k8scluster-delete osm-k8s-cluster

   ```

4. Review that the cluster has been deleted

   ```bash

   # Get all k8sclusters. Our cluster should not appear.

   osm k8scluster-list

   ```

### \[K8s-03\] Deployment of CNF from OSM

TODO: Under ellaboration. Deploy a CNF over a K8s cluster known by OSM.

1. Register the Kubernetes cluster in OSM

   ```bash

   osm k8scluster-add --creds <KUBECONFIG_FILE> --version v1 --vim <VIM_NAME> --k8s-nets '{"net1": <VIM_MGMT_NETWORK>}' --description "K8s cluster" osm-k8s-cluster

   ```

2. Check that the Kubernetes cluster is successully added

   ```bash

   # Get all k8sclusters. The Operational State of the cluster should be "ENABLED"

   osm k8scluster-list

   ```

3. Onboard the packages

   ```bash

   osm nfpkg-create hackfest_simple_k8s_vnfd.tar.gz

   osm nspkg-create hackfest_simple_k8s_nsd.tar.gz

   ```

4. Instantiate the Network Service

   ```bash

   osm ns-create --ns_name simple-k8s --nsd_name  --vim_account <VIM_ACCOUNT_NAME>  --ssh_keys <PUBLIC_KEY> --config '{vld: [ {name: mgmtnet, vim-network-name: <VIM_MGMT_NET>} ] }'

   ```

5. Wait the Network Service to be completed

   ```bash

   osm ns-list

   ```

6. Delete the Network Service

   ```bash

   osm ns-delete simple-k8s

   ```

7. Delete the descriptors

   ```bash

   osm nspkg-delete hackfest-simple-k8s-ns

   osm nfpkg-delete hackfest-simple-k8s-vnf

   ```

## EPA and performance