Redirect to https port when SSL enabled

If SSL is enabled redirect to the https port
if horizon is accessed via port 80

Deleted the /etc/httpd/conf.d/rootredirect.conf
file statement because the horizon module already adds
those lines to /etc/httpd/conf.d/openstack-dashboard.conf

Change-Id: I5942b5bc4cf9a05b20101cfb9ef2da8461e96522
Fixes: rhbz#1078130
(cherry picked from commit f43d0869c763c84f655405a08c829e1c9c1c2655)