[AWS IAM] Added missing request file for list account aliases

lib/fog/aws/requests/iam/list_account_aliases.rb

@@ -0,0 +1,18 @@
+module Fog
+  module AWS
+    class IAM
+      class Real
+
+        require 'fog/aws/parsers/iam/list_account_aliases'
+    
+        def list_account_aliases(options = {})
+          request({
+            'Action'  => 'ListAccountAliases',
+            :parser   => Fog::Parsers::AWS::IAM::ListAccountAliases.new
+          }.merge!(options))
+        end
+
+      end
+    end
+  end
+end