Add support for MultiStrOpt

This replaces the provider implementation of aodh_config type so that
MultiStrOpt, which is used by several options like
 - oslo_messaging_notifications/driver
 - oslo_policy/policy_dirs
are handled correctly.

Change-Id: I3cae6998ec9a2157f507650859e030c576a3cd8c

puppet-{{cookiecutter.project_name}}/lib/puppet/provider/{{cookiecutter.project_name}}_config/openstackconfig.rb

@@ -1,6 +1,6 @@
 Puppet::Type.type(:{{cookiecutter.project_name}}_config).provide(
-  :ini_setting,
+  :openstackconfig,
-  :parent => Puppet::Type.type(:openstack_config).provider(:ini_setting)
+  :parent => Puppet::Type.type(:openstack_config).provider(:ruby)
 ) do
 
   def self.file_path

puppet-{{cookiecutter.project_name}}/lib/puppet/type/{{cookiecutter.project_name}}_config.rb

@@ -7,14 +7,23 @@ Puppet::Type.newtype(:{{cookiecutter.project_name}}_config) do
     newvalues(/\S+\/\S+/)
   end
 
-  newproperty(:value) do
+  newproperty(:value, :array_matching => :all) do
+    desc 'The value of the setting to be defined.'
+    def insync?(is)
+      return true if @should.empty?
+      return false unless is.is_a? Array
+      return false unless is.length == @should.length
+      return (
+        is & @should == is or
+        is & @should.map(&:to_s) == is
+      )
+    end
     desc 'The value of the setting to be defined.'
     munge do |value|
       value = value.to_s.strip
       value.capitalize! if value =~ /^(true|false)$/i
       value
     end
-    newvalues(/^[\S ]*$/)
 
     def is_to_s( currentvalue )
       if resource.secret?

puppet-{{cookiecutter.project_name}}/spec/unit/provider/{{cookiecutter.project_name}}_config/ini_setting_spec.rb

@@ -2,7 +2,7 @@
 # these tests are a little concerning b/c they are hacking around the
 # modulepath, so these tests will not catch issues that may eventually arise
 # related to loading these plugins.
-# I could not, for the life of me, figure out how to programatcally set the modulepath
+# I could not, for the life of me, figure out how to programmatically set the modulepath
 $LOAD_PATH.push(
   File.join(
     File.dirname(__FILE__),
@@ -26,7 +26,7 @@ $LOAD_PATH.push(
     'lib')
 )
 require 'spec_helper'
-provider_class = Puppet::Type.type(:{{cookiecutter.project_name}}_config).provider(:ini_setting)
+provider_class = Puppet::Type.type(:{{cookiecutter.project_name}}_config).provider(:openstackconfig)
 describe provider_class do
 
   it 'should default to the default setting when no other one is specified' do

puppet-{{cookiecutter.project_name}}/spec/unit/type/{{cookiecutter.project_name}}_config_spec.rb

@@ -29,12 +29,12 @@ describe 'Puppet::Type.type(:{{cookiecutter.project_name}}_config)' do
 
   it 'should accept a valid value' do
     @{{cookiecutter.project_name}}_config[:value] = 'bar'
-    expect(@{{cookiecutter.project_name}}_config[:value]).to eq('bar')
+    expect(@{{cookiecutter.project_name}}_config[:value]).to eq(['bar'])
   end
 
   it 'should not accept a value with whitespace' do
     @{{cookiecutter.project_name}}_config[:value] = 'b ar'
-    expect(@{{cookiecutter.project_name}}_config[:value]).to eq('b ar')
+    expect(@{{cookiecutter.project_name}}_config[:value]).to eq(['b ar'])
   end
 
   it 'should accept valid ensure values' do