Historically, karaf distribution was stored in the "karaf/opendaylight-karaf"
module. Similarly, there were modules like "karaf/opendaylight-karaf-empty"
and "karaf/karaf-parent". These artifacts have been moved to odlparent,
so it no longer makes sense to keep an aggregator. This change removes
the karaf-aggregator for controller.
Change-Id: I07499b2a7d57cd9130e3d653545d3aa6c1b72ece
Signed-off-by: Ryan Goulding <ryandgoulding@gmail.com>