Ensure vhost compatibility with Apache 2.4

[mpchadwick]

Matches implementation here

magentostack/templates/default/apache2/magento_vhost.erb

Lines 44 to 50 in 640e67a

	<% if node['apache']['version'] == '2.2' -%>
	Order Deny,Allow
	Deny from all
	Allow from 127.0.0.1
	<% elsif node['apache']['version'] == '2.4' -%>
	Require host 127.0.0.1
	<% end -%>

[martinb3]

Hi there -- if we're going to add support for Apache 2.4, we'd also want to add a platform that has Apache 2.4 into our test suites, as well as compatibility in other places like Apache modules/names. If you would make those changes, and verify the tests pass, I'd be glad to merge. Thank you!