Always create signing_dir regardless of token format

Fixes bug 1088801

devstack does not create signing_dir when keystone token format is UUID.
If the default value of signing_dir is read-only, OpenStack services
such as Quantum server failed to start due to permission denied.

On the keystone client cannot know which token_format is used in keystone
in advance, so signing_dir should be created regardless of the token format.

Change-Id: I1b0d25c1ac4d22d9fb2c5443d15b96fdaa5a4c81
diff --git a/lib/nova b/lib/nova
index 3a4d34d..f059576 100644
--- a/lib/nova
+++ b/lib/nova
@@ -172,9 +172,7 @@
         " -i $NOVA_API_PASTE_INI
     fi
 
-    if [[ "$KEYSTONE_TOKEN_FORMAT" == "PKI" ]]; then
-        iniset $NOVA_API_PASTE_INI filter:authtoken signing_dir $NOVA_AUTH_CACHE_DIR
-    fi
+    iniset $NOVA_API_PASTE_INI filter:authtoken signing_dir $NOVA_AUTH_CACHE_DIR
 
     if is_service_enabled n-cpu; then
         # Force IP forwarding on, just on case
@@ -378,11 +376,9 @@
         $NOVA_BIN_DIR/nova-manage db sync
     fi
 
-    if [[ "$KEYSTONE_TOKEN_FORMAT" == "PKI" ]]; then
-        # Create cache dir
-        sudo mkdir -p $NOVA_AUTH_CACHE_DIR
-        sudo chown `whoami` $NOVA_AUTH_CACHE_DIR
-    fi
+    # Create cache dir
+    sudo mkdir -p $NOVA_AUTH_CACHE_DIR
+    sudo chown `whoami` $NOVA_AUTH_CACHE_DIR
 }
 
 # install_novaclient() - Collect source and prepare