When a shard becomes search active then trigger a refresh instead of waiting for the next scheduled refresh.
The `IndexShard#awaitShardSearchActive(...)` method registers a refresh listener and then often waits for the refresh scheduler to trigger a refresh. By default this is one second. In order to avoid increasing the query time of the Search API, the mentioned method should trigger a refresh instead for waiting it to happen.

As part of this change we also need to disable the refresh scheduler completely. Otherwise we run at risk of running two refreshes next after each other. One triggered from making shard search active and one from the refresh scheduler.  



server/src/test/java/org/elasticsearch/index/shard/IndexShardTests.java
() -> blockingCallRelocated(shard, relocationRouting, (primaryContext, listener) -> fail("should not be called"))
        );
        closeShards(shard);
    }
    public void testRelocatedShardCanNotBeRevivedConcurrently() throws IOException, InterruptedException, BrokenBarrierException {
        final IndexShard shard = newStartedShard(true);
        final ShardRouting originalRouting = shard.routingEntry();
        final ShardRouting relocationRouting = ShardRoutingHelper.relocate(originalRouting, "other_node");
        IndexShardTestCase.updateRoutingEntry(shard, relocationRouting);
        CyclicBarrier cyclicBarrier = new CyclicBarrier(3);
        AtomicReference<Exception> relocationException = new AtomicReference<>();
        Thread relocationThread = new Thread(new AbstractRunnable() {
            @Override
            public void onFailure(Exception e) {
                relocationException.set(e);
            }
            @Override
            protected void doRun() throws Exception {
                cyclicBarrier.await();
                blockingCallRelocated(shard, relocationRouting, (primaryContext, listener) -> listener.onResponse(null));
            }
        });
        relocationThread.start();
        AtomicReference<Exception> cancellingException = new AtomicReference<>();
        Thread cancellingThread = new Thread(new AbstractRunnable() {
            @Override
            public void onFailure(Exception e) {
                cancellingException.set(e);
            }
            @Override