Remove Keystone and Memcache from Undercloud

Keystone is no longer used in undercloud since we replaced it by basic
auth mechanism[1].

Also, memcached was used by caching(Keystone, Nova and Heat) and
the authtoken middleware but all of these are no longer used in
undercloud. (Ephemeral Heat does not use caching with memcached.)

[1] c293dfc7b1

Change-Id: Ifa80bee358edf1e8c07ed4ac62bcf676d65ab925

environments/undercloud.yaml

@@ -17,9 +17,6 @@ resource_registry:
   OS::TripleO::Services::OpenStackClients: ../deployment/clients/openstack-clients-baremetal-ansible.yaml
   OS::TripleO::Services::HeatEphemeral: ../deployment/heat/heat-ephemeral-container-ansible.yaml
 
-  # Disable keystone by default
-  OS::TripleO::Services::Keystone: OS::Heat::None
-  OS::TripleO::Services::Memcached: OS::Heat::None
   # services we disable by default on the undercloud
   OS::TripleO::Services::Rear: OS::Heat::None
 

roles/Undercloud.yaml

@@ -34,10 +34,8 @@
     - OS::TripleO::Services::IronicPxe
     - OS::TripleO::Services::Iscsid
     - OS::TripleO::Services::Kernel
-    - OS::TripleO::Services::Keystone
     - OS::TripleO::Services::LoginDefs
     - OS::TripleO::Services::MasqueradeNetworks
-    - OS::TripleO::Services::Memcached
     - OS::TripleO::Services::MySQL
     - OS::TripleO::Services::MySQLClient
     - OS::TripleO::Services::NeutronApi

roles_data_undercloud.yaml

@@ -37,10 +37,8 @@
     - OS::TripleO::Services::IronicPxe
     - OS::TripleO::Services::Iscsid
     - OS::TripleO::Services::Kernel
-    - OS::TripleO::Services::Keystone
     - OS::TripleO::Services::LoginDefs
     - OS::TripleO::Services::MasqueradeNetworks
-    - OS::TripleO::Services::Memcached
     - OS::TripleO::Services::MySQL
     - OS::TripleO::Services::MySQLClient
     - OS::TripleO::Services::NeutronApi