Extracting common functionality for rpm based distros

Rather than dublicating code to implement rhel or any
other derivitive, this patch introduces an rpm-distro
element that should be used as a dependency.

Change-Id: I8a92bb041764d03f430b438f0013704f79a8674c

elements/fedora/element-deps

@@ -3,3 +3,4 @@ dracut-network
 cache-url
 dkms
 yum
+rpm-distro

elements/rpm-distro/pre-install.d/00-usr-local-bin-secure-path

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+sed -i '/secure_path/ s/$/:\/usr\/local\/bin/' /etc/sudoers