Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1124386
Description of problem:
When usng the API to create a default PXE menu, from the server itself - the URL points at localhost

Version-Release number of selected component (if applicable):

How reproducible100%

Steps to Reproduce:
1. Log onto the Satellite via ssh
2. Call the API to set the Default PXE menu (curl -K /opt/hoici/etc/curl-hoici.conf -XGET --data-urlencode per_page=9999 https://localhost/api/v2/config_templates/build_pxe_default)
3. cat /var/lib/tftpboot/pxelinux.cfg/default

Actual results:

DEFAULT menu

PROMPT 0

MENU TITLE PXE Menu

TIMEOUT 200

TOTALTIMEOUT 6000

ONTIMEOUT local

LABEL local

MENU LABEL (local)

MENU DEFAULT

LOCALBOOT 0

LABEL HOI-6.5.0-ci-Library - crash/IPS-Satellite6

kernel boot/RedHat-6.5-x86_64-vmlinuz

append initrd=boot/RedHat-6.5-x86_64-initrd.img ks=https://localhost/unattended/template/HOI-6.5.0-ci-Library/IPS-Satellite6 ksdevice=bootif network kssendmac

ipappend 2

Expected results:
The kickstart should contain the hostname of the tftp capsule

Additional info:
Below is a posible fix copied from the host_template_helpers.rb

/usr/share/foreman/app/controllers/api/v2/config_templates_controller.rb line 90

def default_template_url template, hostgroup
  # Get basic stuff
       config   = URI.parse(Setting[:unattended_url])
       protocol = config.scheme || 'http'
       port     = config.port || request.port
       host     = config.host || request.host

url_for :only_path => false, :action => :template, :controller => '/unattended',
               :protocol  => protocol, :host => host, :port => port,
               :id        => template.name, :hostgroup => hostgroup.name
     End