Remove cache dirs from the services

PKI tokens have been actively deprecated from keystone and there are
deprecations being emitted from keystonemiddleware. Because of this we
no longer need an auth cache directory in the services where the PKI
certifcates used to be stored.

Remove the creation and use of all these AUTH_CACHE directories.

Change-Id: I5680376e70e74882e9fdb87ee1b95d5f40570ad7
diff --git a/lib/nova b/lib/nova
index 1112f29..dcf2a1c 100644
--- a/lib/nova
+++ b/lib/nova
@@ -46,7 +46,6 @@
 NOVA_STATE_PATH=${NOVA_STATE_PATH:=$DATA_DIR/nova}
 # INSTANCES_PATH is the previous name for this
 NOVA_INSTANCES_PATH=${NOVA_INSTANCES_PATH:=${INSTANCES_PATH:=$NOVA_STATE_PATH/instances}}
-NOVA_AUTH_CACHE_DIR=${NOVA_AUTH_CACHE_DIR:-/var/cache/nova}
 
 NOVA_CONF_DIR=/etc/nova
 NOVA_CONF=$NOVA_CONF_DIR/nova.conf
@@ -240,7 +239,7 @@
         sudo rm -rf $NOVA_INSTANCES_PATH/*
     fi
 
-    sudo rm -rf $NOVA_STATE_PATH $NOVA_AUTH_CACHE_DIR
+    sudo rm -rf $NOVA_STATE_PATH
 
     # NOTE(dtroyer): This really should be called from here but due to the way
     #                nova abuses the _cleanup() function we're moving it
@@ -464,7 +463,7 @@
             iniset $NOVA_CONF DEFAULT osapi_compute_link_prefix $NOVA_SERVICE_PROTOCOL://$NOVA_SERVICE_HOST:$NOVA_SERVICE_PORT
         fi
 
-        configure_auth_token_middleware $NOVA_CONF nova $NOVA_AUTH_CACHE_DIR
+        configure_auth_token_middleware $NOVA_CONF nova
     fi
 
     if is_service_enabled cinder; then
@@ -658,13 +657,6 @@
     fi
 }
 
-# create_nova_cache_dir() - Part of the init_nova() process
-function create_nova_cache_dir {
-    # Create cache dir
-    sudo install -d -o $STACK_USER $NOVA_AUTH_CACHE_DIR
-    rm -f $NOVA_AUTH_CACHE_DIR/*
-}
-
 function create_nova_conf_nova_network {
     local public_interface=${PUBLIC_INTERFACE:-$PUBLIC_INTERFACE_DEFAULT}
     iniset $NOVA_CONF DEFAULT network_manager "nova.network.manager.$NETWORK_MANAGER"
@@ -722,7 +714,6 @@
         done
     fi
 
-    create_nova_cache_dir
     create_nova_keys_dir
 
     if [[ "$NOVA_BACKEND" == "LVM" ]]; then