relevant changes to tests for creation Date and enhanced networking support

lib/fog/aws/requests/compute/describe_images.rb

@@ -36,7 +36,7 @@ module Fog
         #       * 'rootDeviceName'<~String> - Root device name, e.g. /dev/sda1
         #       * 'rootDeviceType'<~String> - Root device type, ebs or instance-store
         #       * 'virtualizationType'<~String> - Type of virtualization
-        #       * 'creationDate'<~Date> - Date the image was created
+        #       * 'creationDate'time<~Datetime> - Date and time the image was created
         #       * 'enaSupport'<~Boolean> - whether or not the image supports enhanced networking
         #
         # {Amazon API Reference}[http://docs.amazonwebservices.com/AWSEC2/latest/APIReference/ApiReference-query-DescribeImages.html]

tests/requests/compute/image_tests.rb

@@ -21,7 +21,9 @@ Shindo.tests('Fog::Compute[:aws] | image requests', ['aws']) do
       'rootDeviceType'      => String,
       'stateReason'         => {},
       'tagSet'              => {},
-      'virtualizationType'  => String
+      'virtualizationType'  => String,
+      'creationDate' => Fog::Nullable::Time,
+      'enaSupport' => Fog::Nullable::Boolean
     }],
     'requestId'     => String,
   }