Description of problem:
The default does not specify the path, so httpd puts the socket in /etc/httpd/logs which can not be accessed.
See  for an example of this failure.
I found bug#611182 which is old and for Fedora. It seems to be fixed there.
Versions I am using
httpd x86_64 2.2.15-30.el6_5 rhel-internal-z 820 k
mod_wsgi x86_64 3.2-6.el6_5 rhel-internal-z 65 k
This is essentially the same route-cause as bug 966311, we need to fix the mod_wsgi compile-time default to use run/ not logs/, so it works by default - as we did in Fedora. Marking as dupe.