[TEST] Minor updates to rest api spec tests

Author: estolfo

rest-api-spec/src/main/resources/rest-api-spec/test/msearch/10_basic.yml

@@ -66,9 +66,9 @@ setup:
 "Least impact smoke test":
 # only passing these parameters to make sure they are consumed
   - do:
-      max_concurrent_shard_requests: 1
-      max_concurrent_searches: 1
       msearch:
+        max_concurrent_shard_requests: 1
+        max_concurrent_searches: 1
         body:
           - index: index_*
           - query:

rest-api-spec/src/main/resources/rest-api-spec/test/tasks.list/10_basic.yml

@@ -22,6 +22,7 @@
 "tasks_list headers":
   - skip:
       version: " - 6.99.99"
+      features: headers
       reason:  task headers has been added in 7.0.0
 
   - do: