Enable and implement get address for request layer along with mocking support for the compute service.

lib/fog/hp/compute.rb

@@ -34,6 +34,7 @@ module Fog
       request :delete_security_group
       request :delete_security_group_rule
       request :delete_server
+      request :get_address
       request :get_flavor_details
       request :get_image_details
       request :get_security_group

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

@@ -0,0 +1,45 @@
+module Fog
+  module Compute
+    class HP
+      class Real
+
+        # Get details about an existing floating IP address
+        #
+        # ==== Parameters
+        # * 'address_id'<~Integer> - Id of floating IP address get details for
+        #
+        # ==== Returns
+        # * response<~Excon::Response>:
+        #   * body<~Hash>:
+        #     * 'floating_ip'<~Hash> -
+        #       * '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 get_address(address_id)
+          request(
+            :expects  => [200],
+            :method   => 'GET',
+            :path     => "os-floating-ips/#{address_id}"
+          )
+        end
+
+      end
+
+      class Mock
+
+        def get_address(address_id)
+          response = Excon::Response.new
+          if address = self.data[:addresses][address_id]
+            response.status = 200
+            response.body = { 'floating_ip' => address }
+            response
+          else
+            raise Fog::Compute::HP::NotFound
+          end
+        end
+
+      end
+    end
+  end
+end