Fix up OmniOS tests

test/integration/helpers/serverspec/spec_helper.rb

@@ -2,3 +2,26 @@ require 'serverspec'
 
 set :backend, :exec
 set :path, '/sbin:/usr/local/sbin:$PATH'
+
+def get_family
+  fam = 'solaris2'
+  return fam unless File.exist? '/etc/release'
+  File.open("/etc/release") do |file|
+      while line = file.gets
+        case line
+        when /^\s*(OmniOS)/
+          fam = 'omnios'
+        end
+      end
+  end
+  fam
+end
+
+def postfix_conf_path
+  if os[:family] == 'solaris' && get_family == 'omnios'
+    '/opt/omni/etc/postfix/'
+  else
+    '/etc/postfix'
+  end
+end
+