Build a Karaf 4 distribution
Build a Karaf 4 distribution

This switches distribution-karaf to karaf4-parent, and cleans up the
POM.

Change-Id: I77856390b6eb1a0d51efc437dafbf28b3243abfc
Signed-off-by: Stephen Kitt <c64219c0e25aff6572376b1dfbf7cf444494f5c6@redhat.com>

opendaylight/ttp,opendaylight/ttp