acl-plugin: add the debug CLI to show macip ACLs and where they are applied (VPP...

acl-plugin: add the debug CLI to show macip ACLs and where they are applied (VPP-936)

When looking at resource utilisation, it is useful to understand
the interactions between the acl-plugin and the rest of VPP.
MACIP ACLs till now could only be dumped via API,
which is tricky when debugging. Add the CLIs to see
the MACIP ACLs and where they are applied.

Change-Id: I3211901589e3dcff751697831c1cd0e19dcab1da
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
(cherry picked from commit f2cfcf676e67a7ea80ce20a69826210eb97acba5)