Updated with the os_sdn network
Merge pull request #229 from rperryman/pull-req-master-0b15c3380f90d988c12b45ee9d3a3c8a7746449c

Update to support the OS_SDN network [1/1]
v6prefix auto generation and tests
tweaks based on review feedback, checked with tests
Merge pull request #230 from cloudedge/pull-req-master-7b2595345449549a947599bce19b7b2359708d68

https://github.com/crowbar/barclamp-network/pull/230

Merged by devtool for VictorLowther
add network specific attribs
fix typo in names