Ubuntu/source deployment of several images (horizon, placement-api, zun)
failed with:
+ exec /usr/sbin/apache2 -DFOREGROUND
apache2: Syntax error on line 80 of /etc/apache2/apache2.conf: DefaultRuntimeDir must be a valid directory, absolute or relative to ServerRoot
Change-Id: Ie2a1077f7def0743f1403341985e2109aa490026
(cherry picked from commit 932f09bcd6)