CBQE-2791: rebalance test n1ql fixes

Change-Id: I36ac336de23e506d05ba7001ac278a00a2347d56
Reviewed-on: http://review.couchbase.org/50713
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Iryna Mironava <irynamironava@yandex.ru>
Tested-by: Iryna Mironava <irynamironava@yandex.ru>

pytests/tuqquery/tuq_cluster_ops.py

@@ -30,8 +30,17 @@ def tearDown(self):
             super(QueriesOpsTests, self).tearDown()
         except:
             pass
-        ClusterOperationHelper.cleanup_cluster(self.servers)
-        self.sleep(10)
+        try:
+            ClusterOperationHelper.cleanup_cluster(self.servers, master=self.master)
+            self.sleep(1)
+        except:
+            for server in set(self.servers) - set([self.master]):
+                try:
+                    rest = RestConnection(server)
+                    rest.force_eject_node()
+                    time.sleep(1)
+                except BaseException, e:
+                    self.fail(e)
 
 
     def suite_tearDown(self):
@@ -218,6 +227,7 @@ def test_warmup(self):
             except:
                 pass
             ClusterOperationHelper.wait_for_ns_servers_or_assert(self.servers, self)
+            self.verify_cluster_stats(self.servers[:self.nodes_init])
             self.sleep(5)
             self.test_union_all()
         finally:
@@ -230,6 +240,7 @@ def test_with_backup(self):
             node = RestConnection(self.master).get_nodes_self()
             self.is_membase = False
             BackupHelper(self.master, self).backup('default', node, tmp_folder)
+            self.verify_cluster_stats(self.servers[:self.nodes_init])
             self.test_union_all()
         finally:
             self.shell.delete_files(tmp_folder)