[TEST] Fix incorrect test cluster name in cluster health doc tests

docs/reference/cluster/health.asciidoc

@@ -34,7 +34,7 @@ Returns this:
   "active_shards_percent_as_number": 50.0
 }
 --------------------------------------------------
-// TESTRESPONSE[s/testcluster/docs_integTest/]
+// TESTRESPONSE[s/testcluster/docs_integTestCluster/]
 // TESTRESPONSE[s/"number_of_pending_tasks" : 0,/"number_of_pending_tasks" : $body.number_of_pending_tasks,/]
 // TESTRESPONSE[s/"task_max_waiting_in_queue_millis": 0/"task_max_waiting_in_queue_millis": $body.task_max_waiting_in_queue_millis/]
 

docs/reference/getting-started.asciidoc

@@ -217,7 +217,7 @@ epoch      timestamp cluster       status node.total node.data shards pri relo i
 1475247709 17:01:49  elasticsearch green           1         1      0   0    0    0        0             0                  -                100.0%
 --------------------------------------------------
 // TESTRESPONSE[s/0             0/0             [01]/]
-// TESTRESPONSE[s/1475247709 17:01:49  elasticsearch/\\d+ \\d+:\\d+:\\d+ docs_integTest/ _cat]
+// TESTRESPONSE[s/1475247709 17:01:49  elasticsearch/\\d+ \\d+:\\d+:\\d+ docs_integTestCluster/ _cat]
 
 We can see that our cluster named "elasticsearch" is up with a green status.