[nancy][grue]Add Grue cluster into master

added 12 commits

• a3aaff6d...497aee1a - 7 commits from branch master
• 446f27ef - [nancy][grue] Configure MAC Address BMC ONLY
• 62c32b43 - [nancy][grue] g5k-checks on grue cluster
• 8c0bfd00 - [nancy][grue] Fix Eth{1..3} for grue cluster
• d9a5c6b2 - [nancy][grue] Add predictible network interface mapping
• 91dfbed1 - [nancy][grue] Add vlan definition and kavlan configuration

Compare with previous version

merged

mentioned in commit 4024c458