Updates kitchen cloud yaml

- Updates the Fedora 19 image
- Give ability to override EC2 Availability Zone with ENV
[COOK-4644] - add support to nginx::repo for Amazon Linux

Signed-off-by: Christopher Webber <cwebber@getchef.com>
[COOK-4658] - Nginx::socketproxy if the context is blank or nonexistant, the location in the config file has a double slash at the beginning

Signed-off-by: Christopher Webber <cwebber@getchef.com>
Version bump to 2.7.2
Publish 2.7.2 Changelog
Bump to 2.7.3 for Dev
[COOK-4703] Default openssl version to 1.0.1h to address CVE-2014-0224

Signed-off-by: Christopher Webber <cwebber@getchef.com>
Version bump to 2.7.4
Publish 2.7.4 Changelog
ignore Ruby manager files
Merge branch 'recovered_commits'