correction in iam/list_access_keys parser: Username should be UserName

lib/fog/aws/models/iam/access_keys.rb

@@ -13,8 +13,6 @@ module Fog
 
         def all
           data = service.list_access_keys('UserName'=> @username).body['AccessKeys']
-          # AWS response doesn't contain the UserName, this injects it
-          data.each {|access_key| access_key['UserName'] = @username }
           load(data)
         end
 

lib/fog/aws/parsers/iam/list_access_keys.rb

@@ -10,7 +10,7 @@ module Fog
 
           def end_element(name)
             case name
-            when 'AccessKeyId', 'Status', 'Username'
+            when 'AccessKeyId', 'Status', 'UserName'
               @access_key[name] = value
             when 'member'
               @response['AccessKeys'] << @access_key