Fix for NPE in OSPF, when forwarding address is not set.

Change-Id: Iff310eee0a5c4c9a34971b6cf5d958d8ed5004e2
Signed-off-by: Dana Kutenicsova <dkutenic@cisco.com>
BUG-2109 : clear BGP session after it was already initialized

Change-Id: Ib70a725b948892a2a887a941bdcb4e8dcfdb80eb
Signed-off-by: Dana Kutenicsova <dkutenic@cisco.com>