GORA-374 Implement Rackspace Cloud Orchestration in GoraCI

Hi Folks,
This PR adds the required Hardware configuration for the GoraCI builds to run under TheASF INFRA RAX account.
Please checkout the additions to gora.properties for this module. They are pretty self explanitory.
```
gora.datastore.rackspace.continent=rackspace-cloudservers-us
gora.datastore.rackspace.username=asf-gora
gora.datastore.rackspace.apikey= // API Key can be found by logging in to the account 
gora.datastore.rackspace.region=DFW // default to Dallas, Texas
gora.datastore.rackspace.imageid=6110edfe-8589-4bb1-aa27-385f12242627 //Ubuntu 13.10 (Saucy Salamander) (PVHVM)
gora.datastore.rackspace.flavorid=6
gora.datastore.rackspace.servername=goraci_test_server
gora.datastore.rackspace.num.servers=20
gora.datastore.rackspace.uploadpubkey=false //one already exists as goraci-keypair
```
Thats about it to be honest.