Correctly fix aliases quoting logic (#206)

We were previously incorrectly adding double quotes for the alias values.
According to the man page it's not required. However, there is a requirement if
its a command being pipe.

In addition, the man page mentions this for the alias name:

  The  name  is  a  local  address (no domain part).  Use double quotes when the
  name contains any special characters such as whitespace, `#', `:', or `@'. The
  name is folded to lowercase, in order to make database lookups case
  insensitive.

This includes logic to support this automatically.

- Add new tests for aliases testing all types
- Convert all serverspec tests to inspec
- Add Github actions
- Update platforms to test

Signed-off-by: Lance Albertson <lance@osuosl.org>

test/integration/canonical/controls/canonical.rb

@@ -0,0 +1,17 @@
+recipient_canonical =
+  case os.family
+  when 'suse'
+    '/etc/postfix/recipient_canonical.lmdb'
+  else
+    '/etc/postfix/recipient_canonical.db'
+  end
+
+control 'canonical' do
+  describe file recipient_canonical do
+    it { should be_file }
+  end
+
+  describe file '/etc/postfix/main.cf' do
+    its('content') { should match(%r{^\s*recipient_canonical_maps\s*=.*\/etc\/postfix\/recipient_canonical\s*$}) }
+  end
+end