@Override
        public void run() {
          // disconnectFromDS();
          Properties config = new Properties();
          config.setProperty(ROLES, vmRoles[vm]);
          config.setProperty(ENABLE_NETWORK_PARTITION_DETECTION, "false");
          getSystem(config);
        }
Tests the configuration of one unique Role in each of four vms. Verifies that each vm is aware
of the other vms' Roles.
geode-core/src/distributedTest/java/org/apache/geode/distributed/DistributedMemberDUnitTest.java