add KeySpec to create_key mock and expected format in tests

Author: geemus

lib/fog/aws/requests/kms/create_key.rb

@@ -42,6 +42,7 @@ def create_key(*args)
             'Description' => nil,
             'Enabled' => true,
             'KeyId' => key_id,
+            'KeySpec' => 'SYMMETRIC_DEFAULT',
             'KeyState' => 'Enabled',
             'KeyUsage' => 'ENCRYPT_DECRYPT',
             'Policy' => nil

tests/requests/kms/helper.rb

@@ -14,6 +14,7 @@ module Formats
           'Description' => Fog::Nullable::String,
           'Enabled' => Fog::Boolean,
           'KeyId' => String,
+          'KeySpec' => String,
           'KeyState' => String,
           'KeyUsage' => String
         }