void sendView(GMSMembershipView<ID> view, List<ID> newMembers)
      throws InterruptedException {
    if (isShuttingDown()) {
      throw new InterruptedException("shutting down");
    }
    sendView(view, false, viewProcessor);
  }
Transitions this member into the coordinator role. This must be invoked under a synch on
viewInstallationLock that was held at the time the decision was made to become coordinator so
that the decision is atomic with actually becoming coordinator.

@param oldCoordinator may be null
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/membership/GMSJoinLeave.java