refactor(kitchen+travis+inspec): use pre-salted images

* Semi-automated using https://github.com/myii/ssf-formula/pull/36
* Restructure all tests according to updated test suites
* Improve tests where necessary (code style, new platforms and package versions)

test/integration/v201707-py2/controls/pkgs_spec.rb

@@ -0,0 +1,26 @@
+version =
+  case platform[:family]
+  when 'redhat'
+    case platform[:name]
+    when 'amazon'
+      '2017.7.8-1.el7'
+    when 'centos'
+      '2017.7.8-1.el6'
+    end
+  when 'debian'
+    '2017.7.8+ds-1'
+  end
+
+control 'salt packages' do
+  title 'should be installed'
+
+  %w(
+    salt-master
+    salt-minion
+  ).each do |p|
+    describe package(p) do
+      it { should be_installed }
+      its('version') { should eq version }
+    end
+  end
+end

test/integration/v201707-py2/controls/service_spec.rb

@@ -0,0 +1,13 @@
+control 'salt services' do
+  title 'should be running'
+
+  %w(
+    salt-master
+    salt-minion
+  ).each do |p|
+    describe service(p) do
+      it { should be_enabled }
+      it { should be_running }
+    end
+  end
+end