[COOK-4417] Expand test harness to encompass 32-bit boxes as well

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 3.1.4
Publish 3.1.4 Changelog
Version bump to 3.1.5 (for development)
[COOK-4463] - support multiple GPG keys

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-4364] - yum_repository delete action fails

Signed-off-by: Sean OMeara <someara@opscode.com>
updating Berksfile
Version bump to 3.1.6
Publish 3.1.6 Changelog
Version bump to 3.1.7 (for development)