Add support for dhcpcd in the renew_lease method

In Cirros 0.6.0 and newer there is dhcpcd client used instead of old
udhcpc. This patch adds support to that new client in the
remote_client's renew_lease method.

Related-Bug: #2003063
Change-Id: I5d5648332e1c84221e708c29a904fcaaffdb451e
2 files changed