Switch to dnf for fedora
Switch to dnf for fedora

This logic came from install_puppet.sh in system-config.

Change-Id: I87cb93411cbd07b214c3744bdc96045a2abb9a71
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

dongwenjuan/project-config,Tesora/tesora-project-config,noorul/os-project-config,dongwenjuan/project-config,noorul/os-project-config,Tesora/tesora-project-config,openstack-infra/project-config,openstack-infra/project-config