refactor/DRY get_network_by_type method
Fix up bridge slave finding code to skip OVS-created phantom devices.
Merge pull request #157 from MirantisDellCrowbar/bug/ovs/pebbles/master

https://github.com/crowbar/barclamp-deployer/pull/157

Merged by devtool for ArkadyKanevsky
Merge pull request #155 from mapleoin/refactor-network-by-type

https://github.com/crowbar/barclamp-deployer/pull/155

Merged by devtool for ArkadyKanevsky