Merge pull request #1 from fooforge/master

Major overhaul, needs to be tested on RHEL
updates for Vagrant, Berkshelf and Test Kitchen
Update metadata.rb
update test framework
Merge branch 'master' of github.com:svanzoest/ssmtp-cookbook
Changed default attributes to use hash style attributes.

This enables the default recipe to work when there is no domain found from Ohai. For example in a Amazon EC2 instance running from VPC.
Added use_tls attribute and enabled its use in the ssmtp.conf template (as useTLS).
Merge branch 'use_tls'
Merge pull request #3 from ianneub/use_tls

Added use_tls attribute (true by default) and enabled its use in the ssmtp.conf template
Merge pull request #2 from ianneub/master

Change from using node.domain to node['domain'] incase 'domain' is not available.
Update test-kitchen dependency in Gemfile ( Closes svanzoest/ssmtp-cookbook#4 )
Update Berksfile :test dependency on cookbook: sysctl ( Closes svanzoest/ssmtp-cookbook#6 )
Merge branch 'fix-issue-6'
Fixed test-kitchen encrypted data bag support for integration tests