container_id is necessary for VHostUserDriver, binding driver
writes its configuration to file which contains part of container id,
to be able to distinguish conf files inside containers (for case when
vhostuser socket dir mounted to several pods).
Partially-Implements: support-vhost-user-port-type-on-bm-installation
Change-Id: I328585dc6d596371d8511a3cb5ccef907d955c76
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>