skip network if its id is null (CORD-759)
skip network if its id is null (CORD-759)

Change-Id: I65034c5eb7c88f40437c115ca39f8868c61ee69d

leejieyu/vtn2.0,leejieyu/vtn2.0,leejieyu/vtn2.0,leejieyu/vtn2.0