Replaced harcoded nexus proxy URLs with variable.
Replaced harcoded nexus proxy URLs with variable.

Change-Id: I150dc155c81471d098c974491683d15059805ca0
Signed-off-by: Devin Avery <91de405559f02f10bfc60b166474ff543cfe942b@brocade.com>

opendaylight/yangtools,522986491/yangtools,NovusTheory/yangtools,opendaylight/yangtools