Moving DNS Configuration into Bifrost Provisioner

This change introduces the task of configuring nameserver
of the provisioned hosts with the one extracted from
IDF in the provisioner configure-targethosts role.

Change-Id: Ica7261b90b2e3ad93cd0eff3c65121f807147ad1
Depends-On: Iefd17b6968da89fdb44f33dab0e76f3d0622f061
3 files changed