Move aodh to authtoken

In aodh::api, use keystone::resource::authtoken to configure
keystone_authtoken section in aodh.conf, with all parameters
required to configure keystonemiddleware.
This patch will allow to deploy aodh to use Keystone v3 authentification.

Some deprecations:
- aodh::api::keystone_tenant is deprecated in favor of
  aodh::keystone::authtoken::project_name.
- aodh::api::keystone_user is deprecated in favor of
  aodh::keystone::authtoken::username.
- aodh::api::keystone_password is deprecated in favor of
  aodh::keystone::authtoken::password.
- aodh::api::keystone_project_domain_name is deprecated in favor of
  aodh::keystone::authtoken::project_domain_name
- aodh::api::keystone_user_domain_name is deprecated in favor of
  aodh::keystone::authtoken::user_domain_name
- aodh::api::keystone_auth_type is deprecated in favor of
  aodh::keystone::authtoken::auth_type
- aodh::api::keystone_auth_uri is deprecated in favor of
  aodh::keystone::authtoken::auth_uri
- aodh::api::keystone_identity_uri is deprecated in favor of
  aodh::keystone::authtoken::auth_url
- aodh::api::keystone_auth_url is deprecated in favor of
  aodh::keystone::authtoken::auth_url
- aodh::api::memcached_servers is deprecated in favor of
  aodh::keystone::authtoken::memcached_servers

Change-Id: Id8b3d8265f3554865fd77b291f235219b147efb9
Related-Bug: #1604463

spec/acceptance/aodh_wsgi_apache_spec.rb

@@ -42,11 +42,12 @@ describe 'basic aodh' do
       class { '::aodh::keystone::auth':
         password => 'a_big_secret',
       }
+      class { '::aodh::keystone::authtoken':
+        password => 'a_big_secret',
+      }
       class { '::aodh::api':
-        enabled               => true,
-        keystone_password     => 'a_big_secret',
-        keystone_auth_uri     => 'http://127.0.0.1:5000',
-        service_name          => 'httpd',
+        enabled      => true,
+        service_name => 'httpd',
       }
       include ::apache
       class { '::aodh::wsgi::apache':