ifdown: do not try to fire nanny, it is not hired

We do not install nanny policies by default in ifup, so it is
not needed to try to delete them in ifdown. There is currently
no nanny started in inst-sys and the attempt is causing ifdown
to run into timeouts (bnc#876848,bnc#879127).
rpm: drop useless ghost dirs in spec (bnc#873857)
Merge pull request #258 from mtomaschewski/drop-ghosts

rpm: drop useless ghost dirs in spec (bnc#873857)
Merge pull request #257 from mtomaschewski/dhcp4or6

fixes for dhcp4,dhcp6 and ifdown/ifreload issues (bnc#876848,bnc#879127)
Merge branch 'master' into testing