Do not override antlr plugin version
Do not override antlr plugin version

Fixes a maven warning.

Change-Id: I0ec07c469f9a577c841a445e3ac6979574084088
Signed-off-by: Robert Varga <b8bd3df785fdc0ff42dd1710c5d91998513c57ef@cisco.com>

opendaylight/yangtools,opendaylight/yangtools