Use build_file_exception for ha-guide-docinfo

openstack-doc-test 0.9 adds one more option, prepare the config file for
it.

Change-Id: Ib68b8702206939096c10d7196d5c6fed4d005376
(cherry picked from commit 91a5fca68c99ae51b9603061d51fd1062ab45f8b)
Merge "Use build_file_exception for ha-guide-docinfo" into stable/havana