Get rid of ip-phones-hack and avaya-hack wrongness
Add fixture for 'Legacy' VRF
Make Network.vrf required

...and the 'Legacy' VRF the default
Remove ALLOW_LEGACY_AND_VRF
Fix network address; specify VRF

For some reason, the invalid network address wasn't causing problems.
Fix fixture
Merge branch 'more-vrf-fixes' of git://github.com/drkitty/cyder into drkitty-more-vrf-fixes
replace old south migration