Allow python-memcache install from authtoken class

The python-memcache package is required if using memcached. By
default the package is not installed and the define has it set to
false. This change allows managing the python-memcache package
install from the authtoken class.

Change-Id: I492f8eb4826140be3bfa041adb13b2a916a50bb8

manifests/keystone/authtoken.pp

@@ -160,6 +160,10 @@
 #   caching. If left undefined, tokens will instead be cached in-process.
 #   Defaults to $::os_service_default.
 #
+# [*manage_memcache_package*]
+#  (Optional) Whether to install the python-memcache package.
+#  Defaults to false.
+#
 # [*region_name*]
 #   (Optional) The region in which the identity server can be found.
 #   Defaults to $::os_service_default.
@@ -215,6 +219,7 @@ class magnum::keystone::authtoken(
   $memcache_security_strategy     = $::os_service_default,
   $memcache_use_advanced_pool     = $::os_service_default,
   $memcached_servers              = $::os_service_default,
+  $manage_memcache_package        = false,
   $region_name                    = $::os_service_default,
   $revocation_cache_time          = $::os_service_default,
   $token_cache_time               = $::os_service_default,
@@ -260,6 +265,7 @@ class magnum::keystone::authtoken(
     memcache_use_advanced_pool     => $memcache_use_advanced_pool,
     memcache_pool_unused_timeout   => $memcache_pool_unused_timeout,
     memcached_servers              => $memcached_servers,
+    manage_memcache_package        => $manage_memcache_package,
     region_name                    => $region_name,
     revocation_cache_time          => $revocation_cache_time,
     token_cache_time               => $token_cache_time,

releasenotes/notes/authtoken_manage_memcache_package-ed76209f78d8491d.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Passes parameter to keystone authtoken define to manage python-memcache package install.

spec/classes/magnum_keystone_authtoken_spec.rb

@@ -86,6 +86,7 @@ describe 'magnum::keystone::authtoken' do
           :memcache_security_strategy           => 'ENCRYPT',
           :memcache_use_advanced_pool           => true,
           :memcached_servers                    => ['memcached01:11211','memcached02:11211'],
+          :manage_memcache_package              => true,
           :region_name                          => 'region2',
           :revocation_cache_time                => '11',
           :token_cache_time                     => '301',
@@ -128,6 +129,10 @@ describe 'magnum::keystone::authtoken' do
         is_expected.to contain_magnum_config('keystone_authtoken/revocation_cache_time').with_value(params[:revocation_cache_time])
         is_expected.to contain_magnum_config('keystone_authtoken/token_cache_time').with_value(params[:token_cache_time])
       end
+
+      it 'installs python memcache package' do
+        is_expected.to contain_package('python-memcache')
+      end
     end
   end