Remove precise references from configure_mirror.sh
Remove precise references from configure_mirror.sh

Change-Id: I2a9e935c68fdfa974886bb727ec3706faebb4338
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/project-config,openstack-infra/project-config