Enable and add implementation for release address for request layer for the compute service.

lib/fog/hp/compute.rb

@@ -51,6 +51,7 @@ module Fog
       request :list_servers_detail
       request :reboot_server
       request :rebuild_server
+      request :release_address
       #request :resize_server
       #request :revert_resized_server
       request :server_action

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

@@ -0,0 +1,39 @@
+module Fog
+  module Compute
+    class HP
+      class Real
+
+        # Release an existing floating IP address
+        #
+        # ==== Parameters
+        # * id<~Integer> - Id of floating IP address to delete
+        #
+        def release_address(address_id)
+          request(
+            :expects => 202,
+            :method => 'DELETE',
+            :path   => "os-floating-ips/#{address_id}"
+          )
+        end
+
+      end
+
+      class Mock
+
+        def release_address(address_id)
+          response = Excon::Response.new
+          if self.data[:addresses][address_id]
+            self.data[:last_modified][:addresses].delete(address_id)
+            self.data[:addresses].delete(address_id)
+            response.status = 202
+            response.body = "202 Accepted\n\nThe request is accepted for processing.\n\n   "
+            response
+          else
+            raise Fog::Compute::HP::NotFound
+          end
+        end
+
+      end
+    end
+  end
+end