install instructions use unprefixed fedora image

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
Simplified and streamlined Amazon Quickstart

The amazon quickstart images are EBS backed and include cloudinit. I've personally tested these documentation changes as a new user to Docker.
Missing pipe in line 85
Merge pull request #3462 from tsaavik/patch-2

Simplified and streamlined Amazon Quickstart
Merge pull request #3483 from lukaspustina/patch-1

Missing redirect in line 85
Merge pull request #3430 from lsm5/fedora-official-image

install instructions use unprefixed fedora image