@Before
public void prepare() {
Injector injector = new ModulesBuilder()
.add(new OperatorModule())
.add(new AllocationDecidersModule(ImmutableSettings.EMPTY))
.add(new TestModule())
.createInjector();
operation = injector.getInstance(DistributingCollectOperation.class);
Injector shard0Injector = injector.createChildInjector(