Added salt-cloud support for Rackspace OpenStack servers.

pillar.example

     aws_secret: AWSSECRETYkkDY1iQf9zRtl9+pW+Nm+aZY95
     gce_project: test
     gce_service_account_email_address: 867543072364-orl4h2tpp8jcn1tr9ipj@developer.gserviceaccount.com
+    rsos_user: afeawofghob
+    rsos_tenant: tenant_id_number
+    rsos_apikey: WFJIOJEOIGHSOFHESO
+    rsos_regions:
+      - ORD
+      - DFW
+      - IAD
+      - SYD
+      - HKG
+
 salt_cloud_certs:
   aws:
     pem: |

salt/files/cloud.maps.d/rsos.conf

+# This file managed by Salt, do not edit by hand!!
+

salt/files/cloud.profiles.d/rsos.conf

+# This file managed by Salt, do not edit by hand!!
+{% for region in salt['pillar.get']('salt:cloud:rsos_regions', []) %}
+base_ubuntu_rsos_{{ region|lower }}:
+  image: Ubuntu 14.04 LTS (Trusty Tahr)
+  provider: rsos_{{ region|lower }}
+  size: 512MB Standard Instance
+{% endfor %}

salt/files/cloud.providers.d/rsos.conf

+# This file managed by Salt, do not edit by hand!!
+# Providers for openstack-based Rackspace cloud servers.
+
+{% set salt = pillar.get('salt', {}) -%}
+{% set cloud = salt.get('cloud', {}) -%}
+{% for region in cloud.get('rsos_regions', []) %}
+
+rsos_{{ region|lower }}:
+  minion:
+    master: {{ cloud['master'] }}
+  grains:
+    region: {{ region|lower }}
+
+  identity_url: 'https://identity.api.rackspacecloud.com/v2.0/tokens'
+  compute_name: cloudServersOpenStack
+  protocol: ipv4
+  compute_region: {{ region }}
+  provider: openstack
+  user:  {{ cloud['rsos_user'] }}
+  tenant: {{ cloud['rsos_tenant'] }}
+  apikey: {{ cloud['rsos_apikey'] }}
+{% endfor %}