MAINTAINERS: add 2, remove 5

We have a stalled project, as we have a number of maintainers have moved
on. We thank you all for your time.

Going forward, I'm nominating 2 contributors that have a vested
interest:
* @thaJeztah
* @AkihiroSuda

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

MAINTAINERS

@@ -1,8 +1,5 @@
-Aaron Lehmann <aaronl@vitelus.com> (@aaronlehmann)
-Brendan Burns <bburns@microsoft.com> (@brendandburns)
 Derek McGowan <derek@mcgstyle.net> (@dmcgowan)
-Jason Bouzane <jbouzane@google.com> (@jbouzane)
-John Starks <jostarks@microsoft.com> (@jstarks)
-Jonathan Boulle <jon@nstack.com> (@jonboulle)
 Stephen Day <stephen.day@docker.com> (@stevvooe)
 Vincent Batts <vbatts@redhat.com> (@vbatts)
+Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp> (@AkihiroSuda)
+Sebastiaan van Stijn <github@gone.nl> (@thaJeztah)