Enable and implement list addresses for request layer for the compute service.

lib/fog/hp/compute.rb

@@ -39,6 +39,7 @@ module Fog
       request :get_image_details
       request :get_security_group
       request :get_server_details
+      request :list_addresses
       request :list_flavors
       request :list_flavors_detail
       request :list_images

lib/fog/hp/requests/compute/list_addresses.rb

@@ -0,0 +1,41 @@
+module Fog
+  module Compute
+    class HP
+      class Real
+
+        # List all floating IP addresses
+        #
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash>:
+        #     * 'floating_ips'<~Array> -
+        #       * 'id'<~Integer> - Id of the address
+        #       * 'ip'<~String> - Floating IP of the address
+        #       * 'instance_id'<~String> - Id of the associated server instance
+        #       * 'fixed_ip'<~String> - Fixed IP of the address
+        def list_addresses
+          request(
+            :expects  => 200,
+            :method   => 'GET',
+            :path     => "os-floating-ips.json"
+          )
+        end
+
+      end
+
+      class Mock
+
+        def list_addresses
+          response = Excon::Response.new
+          addresses = []
+          addresses = self.data[:addresses].values unless self.data[:addresses].nil?
+
+          response.status = 200
+          response.body = { 'floating_ips' => addresses }
+          response
+        end
+
+      end
+    end
+  end
+end