Use gmail account for maintainer tasks.

Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Acked-by: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Message-Id: <20191126102637.2038-1-yuval.shaia@oracle.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>