Remove legacy CDN APIs and add new CDN APIs

[leibaogit]

Since the old VDMS CDN (SoftLayer_Network_ContentDelivery) was sunset, but we can still the APIs present in the different language examples. In the mean while, the new CDN (SoftLayer_Network_CdnMarketplace) was GAed at 2017, but we can not see the new APIs in all languages.

1. Remove the legacy CDN APIs
   • GO https://sldn.softlayer.com/go/cancel_cdn.go/ https://sldn.softlayer.com/go/get_cdn_list.go/ https://sldn.softlayer.com/go/place_order_cdn.go/

• Perl https://sldn.softlayer.com/perl/place_order_cdn.pl/

• PHP https://sldn.softlayer.com/php/PlaceOrderCDN.php/

• Ruby https://sldn.softlayer.com/ruby/cancel_cdn.rb/ https://sldn.softlayer.com/ruby/place_order_cdn.rb/

2. Add new CDN APIs for all languages.

[leibaogit]

Close it tracking it on other repo