Add Maintainers to fabric-chaincode-java

Artem Barger, Gari Singh, and Yacov Manevich have recently started
working on java chaincode support.  Collectively they have been
among the top contributors to the fabric project, and they can bring
this experience as well as their considerable Java experience to the
Java chaincode project. As maintainers they will be able to expedite
code reviews and help to bring Java chaincode to market in a timely
fashion.

Change-Id: Iec1bef8864dbca6808296010aeb1f45167bf14a9
Signed-off-by: David Enyeart <enyeart@us.ibm.com>

Author: denyeart

MAINTAINERS.rst

@@ -4,11 +4,17 @@ Maintainers
 +---------------------------+---------------------+------------------+----------------+-------------------------------------+
 | Name                      | Gerrit              | GitHub           | RocketChat     | email                               |
 +===========================+=====================+==================+================+=====================================+
+| Artem Barger              | c0rwin              | c0rwin           | c0rwin         | bartem@il.ibm.com                   |
++---------------------------+---------------------+------------------+----------------+-------------------------------------+
+| Gari Singh                | mastersingh24       | mastersingh24    | garisingh      | gari.r.singh@gmail.com              |
++---------------------------+---------------------+------------------+----------------+-------------------------------------+
 | Jim Zhang                 | jimthematrix        | jimthematrix     | jimthematrix   | jim\_the\_matrix@hotmail.com        |
 +---------------------------+---------------------+------------------+----------------+-------------------------------------+
+| Luis Sanchez              | sanchezl            | sanchezl         | sanchezl       | sanchezl@us.ibm.com                 |
++---------------------------+---------------------+------------------+----------------+-------------------------------------+
 | Srinivasan Muralidharan   | muralisr            | muralisrini      | muralisr       | srinivasan.muralidharan99@gmail.com |
 +---------------------------+---------------------+------------------+----------------+-------------------------------------+
-| Luis Sanchez              | sanchezl            | sanchezl         | sanchezl       | sanchezl@us.ibm.com                 |
+| Yacov Manevich            | yacovm              | yacovm           | yacovm         | yacovm@il.ibm.com                   |
 +---------------------------+---------------------+------------------+----------------+-------------------------------------+
 
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