zebra: Do not allow redistribution for non-vrf tables

zebra: Do not allow redistribution for non-vrf tables

Current code was allowing redistribution of kernel routes from
the non-default non vrf tables once FRR was already up and running.

In the case where we add `redistribute kernel` in an upper level
protocol we never consider the non-default vrf or non-vrf tables
so it is never accepted.

In the case where a kernel route is added after `redistribute kernel`
is already in place we were never looking at the fact that the
route was in a non-default non-vrf table.  This code fixes
that issue.

Fixes: #9073
Signed-off-by: Donald Sharp <sharpd@nvidia.com>