Fix websockets ip address config

Fix websockets ip address config

Opendaylight master commit 96914ace4fd625d9a9c89ec49ddeb411fff180b9
uses restconf.cfg to config the websockets ip address.
Opendaylight carbon comiit a6bd56636d246fddcfbbef60277d77d3a7663b46
uses 10-rest-connector.xml to config the websockets ip address.

Commit 168424499efb9c7ed35bf627c417f323164682fa
allow to configure websocket ip address, but for
carbon release. This patch fix it to be
correct to master to configure the restconf.cfg instead
of 10-rest-connector.xml.

Change-Id: I304e15df5c7982283e843285c1910ae3c9a463cc
Signed-off-by: Moshe Levi <moshele@mellanox.com>