Fix ClusterRerouteIT Often Sleeping 30s Needlessly (elastic#77690)

We run the close requests while allocation is disabled. This means, we would
always run down the clock on the request timeout only to find that no shards
are active still.

Author: original-brownbear

server/src/internalClusterTest/java/org/elasticsearch/cluster/allocation/ClusterRerouteIT.java

@@ -97,7 +97,7 @@ private void rerouteWithCommands(Settings commonSettings) throws Exception {
                 .execute().actionGet();
 
         if (randomBoolean()) {
-            client().admin().indices().prepareClose("test").get();
+            client().admin().indices().prepareClose("test").setWaitForActiveShards(ActiveShardCount.NONE).get();
         }
 
         ClusterState state = client().admin().cluster().prepareState().execute().actionGet().getState();
@@ -232,7 +232,7 @@ private void rerouteWithAllocateLocalGateway(Settings commonSettings) throws Exc
 
         final boolean closed = randomBoolean();
         if (closed) {
-            client().admin().indices().prepareClose("test").get();
+            client().admin().indices().prepareClose("test").setWaitForActiveShards(ActiveShardCount.NONE).get();
         }
 
         ClusterState state = client().admin().cluster().prepareState().execute().actionGet().getState();