Derive network config fails for a role when using
any interface routes with list_concat_unique in network
configuration and no user inputs provided.
Change-Id: I26bb26411f22c34ead1b2bfb2a616ddf65f69489
Closes-Bug: #1856124
(cherry picked from commit 81e823c622)
(cherry picked from commit 9e5bcae62c)