Fix log ownership and WSGIProcess* settings for Red Hat releases

According to python-django-horizon's SPEC file log file should
be owned by user 'apache'. According to openstack-dashboard.conf
file located in the same package WSGIProcessGroup should
be 'dashboard' and the name should be identical as WSGIDaemonProcess'
name. It is required to set /var/run/wsgi as WSGISocketPrefix.

[1] http://modwsgi.readthedocs.org/en/latest/configuration-directives/WSGIDaemonProcess.html

Change-Id: I9aca382798c7ab37e267c9988b3947e1b3780712