Fixes NetworkManager Installation Error

Previously, the puppet agent installation was failing due to the
NetworkManager-Wait-online service not being installed:

Error: Could not enable NetworkManager-wait-online: Execution of
'/sbin/chkconfig NetworkManager-wait-online on' returned 1: error
reading information on service NetworkManager-wait-online:
No such file or directory

This service appears to be unneeded for Fedora 19.