export utils.{config, mdsal-utils, southbound-utils} as feature

export utils.{config, mdsal-utils, southbound-utils} as feature

Those bundles are used by genius and neturon northbound.
They should be consumable as feature, not bundle.

For detailed discussion, please refer to the followings
https://lists.opendaylight.org/pipermail/release/2018-January/013604.html
https://lists.opendaylight.org/pipermail/release/2017-September/012356.html
NEUTRON-156

Change-Id: I845989115b28bfc9685ed7fdb43e604e16701fe1
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Signed-off-by: Stephen Kitt <skitt@redhat.com>