While installing openstack(juno), i was on final step of neutron installation i.e 1.Populate the database: and got this error after populate the database command :

su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf \
  --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade juno" neutron

INFO [alembic.migration] Context impl MySQLImpl.