+++ This bug was initially created as a clone of Bug #1036701 +++

ifup and ifdown have one problem that's new in F20 and another that has always existed but might be more commonly seen in F20:

1. In its default configuration in F20, NetworkManager no longer automatically reloads ifcfg files when they change, so we need to reload them manually, so that, eg, creating/editing an ifcfg file and then using "ifup" on it has the expected behavior.

2. Just because an ifcfg file has a UUID= line doesn't mean that it's managed by NM. (In particular, if someone changes their default Ethernet connection from "TYPE=Ethernet" to "TYPE=OVSPort", but doesn't remove the UUID line, then ifup will currently hand it off to NM, but NM won't know what to do with it. Instead, ifup should be handling it itself.)

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The patch is the same as in 1036701. The required NM version in RHEL 7 is 
0.9.9.0-26.git20131108