Allow the auth_token middleware to setup its own signing_dir
if required.
Fixes LP Bug #
1185098.
Change-Id: Id8766efb34d37ca382b865167ec2465d0a1ce8dc
admin_tenant_name = %SERVICE_TENANT_NAME%
admin_user = %SERVICE_USER%
admin_password = %SERVICE_PASSWORD%
-signing_dir = /var/lib/cinder
+# signing_dir is configurable, but the default behavior of the authtoken
+# middleware should be sufficient. It will create a temporary directory
+# in the home directory for the user the cinder process is running as.
+#signing_dir = /var/lib/cinder/keystone-signing