Move out debug to keystone::logging

This patch moves out the deprecated keystone::debug
option to keystone::logging [1]

[1] https://review.openstack.org/#/c/619379/

Change-Id: I4d8270c08d9d59f36023fbd6cf561c23c5346662

manifests/keystone.pp

@@ -55,8 +55,10 @@ class openstack_integration::keystone (
   class { '::keystone::db::mysql':
     password => 'keystone',
   }
+  class { '::keystone::logging':
+    debug => true,
+  }
   class { '::keystone':
-    debug                      => true,
     database_connection        => 'mysql+pymysql://keystone:keystone@127.0.0.1/keystone',
     admin_token                => 'a_big_token',
     admin_password             => 'a_big_secret',