acu157652 add rs_ipN_mac and rs_ipN_name support
- functionality to read the MAC address key pairs for N adapters
- functionality to rename/readdress the NICs in the order provided on
  Windows
Merge pull request #411 from rightscale/ivory_14_06_acu157652_multi_nic_support

rs_ipN_mac and rs_ipN_name support