Fix wrapper cookbook in the specs completely failing

It’s still broken, but now it actually tests

Signed-off-by: Tim Smith <tsmith@chef.io>

spec/default_spec.rb

@@ -5,9 +5,9 @@ describe 'postfix::default' do
     stub_command('/usr/bin/test /etc/alternatives/mta -ef /usr/sbin/sendmail.postfix').and_return(true)
   end
 
-  context 'on Centos 6.5' do
+  context 'on Centos 6' do
     let(:chef_run) do
-      ChefSpec::ServerRunner.new(platform: 'centos', version: 6.5).converge(described_recipe)
+      ChefSpec::ServerRunner.new(platform: 'centos', version: 6.7).converge(described_recipe)
     end
 
     it '[COOK-4423] renders file main.cf with /etc/pki/tls/cert.pem' do
@@ -33,9 +33,9 @@ describe 'postfix::default' do
     end
   end
 
-  context 'on Ubuntu 13.04' do
+  context 'on Ubuntu 16.04' do
     let(:chef_run) do
-      ChefSpec::ServerRunner.new(platform: 'ubuntu', version: 13.04).converge(described_recipe)
+      ChefSpec::ServerRunner.new(platform: 'ubuntu', version: 16.04).converge(described_recipe)
     end
 
     it '[COOK-4423] renders file main.cf with /etc/postfix/cacert.pem' do

spec/sasl_auth_spec.rb

@@ -4,7 +4,7 @@ describe 'postfix::sasl_auth' do
   let(:password_file) { '/etc/postfix/sasl_passwd' }
 
   let(:chef_run) do
-    ChefSpec::ServerRunner.new do |node|
+    ChefSpec::ServerRunner.new(platform: 'ubuntu', version: 16.04) do |node|
       node.default['postfix']['sasl_password_file'] = password_file
     end.converge(described_recipe)
   end

spec/wrapper_spec.rb

@@ -5,9 +5,9 @@ require 'spec_helper'
 # attributes using default level without _attributes
 # recipe clearing them.
 
-describe 'wrapper::default' do
+describe 'test::default' do
   cached(:chef_run) do
-    ChefSpec::SoloRunner.new.converge(described_recipe)
+    ChefSpec::SoloRunner.new(platform: 'ubuntu', version: 16.04).converge(described_recipe)
   end
 
   describe '_attributes recipes' do