removing debian 6 from .kitchen.yml
[COOK-4154] - Add chefspec matchers.rb file to apt cookbook

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-4102] - Only index created repository

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to v2.3.6
Version bump to v2.3.6
Version bump to 2.3.7 (for development)