MAINTAINERS.rst: Add MidoNet section

While the most part of MidoNet code is now externally maintained
using the external plugin mechanism, it can be still useful to
have a contact list.

Change-Id: I3e0a0586c07875ca37ce101dd169eaf78f34f7a5
diff --git a/MAINTAINERS.rst b/MAINTAINERS.rst
index d3e8c67..eeb1f21 100644
--- a/MAINTAINERS.rst
+++ b/MAINTAINERS.rst
@@ -45,6 +45,13 @@
 Neutron
 ~~~~~~~
 
+MidoNet
+~~~~~~~
+
+* Jaume Devesa <devvesa@gmail.com>
+* Ryu Ishimoto <ryu@midokura.com>
+* YAMAMOTO Takashi <yamamoto@midokura.com>
+
 OpenDaylight
 ~~~~~~~~~~~~