Format fixes to SSL certificate contribution

#### SSL certificate problem

OSM is installed by default using https with a self signed certificated. You will obtain the error '*SSL certificate problem: self signed certificate*' on the client side. To skip this error use the appropriate option to skip certificate validation (e.g. `--insecure` for curl, `--no-check-certificate` for wget, ...). However if for some reason you cannot use this option, you can install this certificate as a valid one in your client system.

By default, OSM installer uses a self-signed certificate for HTTPS. That might lead to the error '_SSL certificate problem: self signed certificate_' on the client side. For testing environments, you might want to ignore this error just by using the appropriate options to skip certificate validation (e.g. `--insecure` for curl, `--no-check-certificate` for wget, etc.). However, for more stable setups you might prefer to address this issue by installing the appropriate certificate in your client system.

To install NBI certificate on the client side (tested for Ubuntu):

Get the certificate file "cert.pem" by one of:

- copy from running docker:

These are the steps to install NBI certificate on the client side (tested for Ubuntu):

1. Get the certificate file `cert.pem` by any of these means:

  - From running docker container:

    ```bash

    docker ps | grep nbi

    docker cp <docker-id>:/app/NBI/osm_nbi/http/cert.pem .

    ```

- or from souce code: NBI-folder/osm_nbi/http/cert.pem

- or from etsi git:

  - From souce code: NBI-folder/osm_nbi/http/cert.pem

  - From ETSI's git:

    ```bash

    wget -O cert.pem "https://osm.etsi.org/gitweb/?p=osm/NBI.git;a=blob_plain;f=osm_nbi/http/cert.pem;hb=refs/heads/v7.0"

    ```

Then install this certificate:

2. Then, you should install this certificate:

   ```bash

     sudo cp cert.pem /usr/local/share/ca-certificates/osm_nbi_cert.pem.crt

     sudo update-ca-certificates

     # 1 added, 0 removed; done

   ```

Add to the list of '*/etc/hosts*' a host called "nbi" with the ip address where OSM is running. Can be localhost if client and server are the same machine. Add (or edit) one of these lines:

3. Add to the list of `/etc/hosts` a host called "nbi" with the IP address where OSM is running.

   - It can be `localhost` if client and server are the same machine.

   - For localhost, you would need to add (or edit) these lines:

     ```text

       127.0.0.1     localhost       nbi

       OSM-ip        nbi

     ```

Finally for the URL use host 'nbi' <httts://nbi:9999/osm>  (not localhost neither 127.0.0.1). Test it with:

4. Finally, for the URL, use the `nbi` as host name (i.e. <httts://nbi:9999/osm>).

   - Do not use neither `localhost` nor 127.0.0.1.

   - You can run a quick test with `curl` by:

     ```bash

     curl https://nbi:9999/osm/version

     ```

### VIMs

#### Is the VIM URL reachable and operational?