Merge pull request #215 from centromere/provider-fix

Renamed "provider" to "driver"

salt/files/cloud.providers.d/ec2.conf

   location: eu-west-1
   availability_zone: eu-west-1a
   ssh_username: ubuntu
-  provider: ec2
+  driver: ec2
 {%- endif %}

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

     master: {{ cloud.get('master', 'salt') }}
   grains:
     test: True
-  provider: gce
+  driver: gce
 {%- endif %}

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

   compute_name: cloudServersOpenStack
   protocol: ipv4
   compute_region: {{ region }}
-  provider: openstack
+  driver: openstack
   user:  {{ cloud.get('rsos_user', 'DEFAULT') }}
   tenant: {{ cloud.get('rsos_tenant', 'DEFAULT') }}
   apikey: {{ cloud.get('rsos_apikey', 'DEFAULT') }}

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

 {% set cloud = salt['pillar.get']('salt:cloud', {}) -%}
 
 saltify:
-  provider: saltify
+  driver: saltify
   minion:
     master: {{ cloud.get('master', 'salt') }}