Merge branch 'feature_10986_Autohealswitch_Autoscaleswitch' into 'master'

    max-number-of-intannces: 11

```

#### How to enable/disable autoscaling

With the previous SA architecture based on POL and MON, it is possible to enable/disable autoscaling by patching the POL deployment in kubernetes:

The steps are given below:

1. To enable the autoscaling feature, modify the env `OSMPOL_AUTOSCALE_ENABLED` to `True` in `pol` deployment:

   ```bash

   kubectl -n osm edit deployment pol

   ```

   ```yaml

   OSMPOL_AUTOSCALE_ENABLED: True

   ```

2. To disable the autoscaling feature, modify the env `OSMPOL_AUTOSCALE_ENABLED` to `False` in `pol` deployment:

   ```bash

   kubectl -n osm edit deployment pol

   ```

   ```yaml

   OSMPOL_AUTOSCALE_ENABLED: False

   ```

With the new architecture, Airflow DAGs for scaling can be selectively disabled in Airflow UI by pressing the toggle next to the DAG to pause/unpause it:

- `scalein_vdu`, to enable/disable auto-scale-in

- `scaleout_vdu`, to enable/disable auto-scale-out

#### Example

This will launch a Network Service formed by an HAProxy load balancer and an (autoscalable) Apache web server. Please check:

osm ns-show heal

```

#### How to enable/disable autohealing

With the previous SA architecture, it is possible to enable/disable autohealing by patching the POL deployment in kubernetes:

The steps are given below:

1. To enable the autohealing feature

   - change the env `OSMPOL_AUTOHEAL_ENABLED` to `True` in devops dockerfile.

   - To enable during runtime, in pol deployment file modify the env `OSMPOL_AUTOHEAL_ENABLED` to `True`.

     ```bash

        kubectl -n osm edit deployment pol

     ```

     ```yaml

        - env:

            - name: OSMPOL_AUTOHEAL_ENABLED

              value: True

     ```

2. To disable the autohealing feature

   - change the env `OSMPOL_AUTOHEAL_ENABLED` to `False` in devops dockerfile.

   - To disable during runtime, in pol deployment file modify the env `OSMPOL_AUTOHEAL_ENABLED` to `False`.

     ```bash

        kubectl -n osm edit deployment pol

     ```

     ```yaml

        - env:

            - name: OSMPOL_AUTOHEAL_ENABLED

              value: False

     ```

With the new architecture, Airflow DAGs for healing can be selectively disabled in Airflow UI by pressing the toggle next to the DAG to pause/unpause it:

    - vdu_down, to enable/disable auto-heal

#### Testing:

1. To ensure NS is instantiated successfully, check metrics at Prometheus, visit `http://[OSM_IP]:9091` and look for `osm_vm_status`. Metric value should be '1'.