hwvtepsb: Fixed restconf migration build issues

restconf migration from controller to netconf was done while
hwvtep bundle creation was in progress, so those were not done
for hwvtepsouthbound which is causing build failure.

Change-Id: Ib32c591e0dd197730f1bc50d7e92b38018c0fd7f
Signed-off-by: Vishal Thapar <vishal.thapar@ericsson.com>