Refine IP addressing choices

[scop]

We should refine the IP address choices made available when creating a server.

• Consider not offering the option to create the Utility IP/interface.
• Consider removing the addressing option altogether, and always going with either public IPv4 only, or public IPv4+IPv6.

[thevilledev]

As discussed internally, public IPv4 only for now

[adityawbwce]

Open the lib/ConfigOptions.php file and remove the code between lines # 40 to # 45, which is as follows:
private function getNetworking()

{
    $nw['ipv4only'] = 'Public IPv4 Only';
     $nw['default'] = 'Public Default (IPv4, IPv6 & Utility)';
     return $nw;
 }

Also, remove line #81, which contains the following code within lib/ConfigOptions.php file:
$this->createIPFields($groupId, $this->getNetworking());

Open the lib/vmManager.php file and find the line #69 and replace from
$networking = $this->params['configoptions']['ipaddress'];
to
$networking = "ipv4only";