Allow the user to override the service actions

Allows the user to specify their own array of service actions, e.g.

```ruby
elasticsearch_service 'elasticsearch' do
  service_actions [ :enable, :start ]
end
```

Closes #357.

libraries/provider_service.rb

@@ -69,8 +69,10 @@ class Provider::ElasticsearchService < Chef::Provider::LWRPBase
           supports :status => true, :restart => true
           action :nothing
         end
-        svc_r.run_action(:enable)
-        new_resource.updated_by_last_action(true) if svc_r.updated_by_last_action?
+        new_resource.service_actions.each do |act|
+          svc_r.run_action(act)
+          new_resource.updated_by_last_action(true) if svc_r.updated_by_last_action?
+        end
       end
     end
   end

libraries/resource_service.rb

@@ -22,5 +22,8 @@ class Resource::ElasticsearchService < Chef::Resource::LWRPBase
     # default user limits
     attribute(:memlock_limit, kind_of: String, default: 'unlimited')
     attribute(:nofile_limit, kind_of: String, default: '64000')
+
+    # service actions
+    attribute(:service_actions, kind_of: [Symbol, Array], default: [ :enable ])
   end
 end