BUG-1132: update netty dependency to 4.0.19
BUG-1132: update netty dependency to 4.0.19

Follow-up patch, since controller has already moved.

Change-Id: I01ebfb185918f0ebc4802e394ffaa76dbba7a7f7
Signed-off-by: Robert Varga <b8bd3df785fdc0ff42dd1710c5d91998513c57ef@cisco.com>

inocybe/odl-bgpcep,bigdataops/bgpcep,opendaylight/bgpcep,bigdataops/bgpcep,inocybe/odl-bgpcep