Updates ilm tests

Addresses
- request [/_ilm/start] contains unrecognized parameter: [policy]
- request [/_ilm/stop] contains unrecognized parameter: [index]

Author: picandocodigo

tests/ilm/10_basic.yml

@@ -72,13 +72,11 @@ teardown:
   - is_true: 'operation_mode'
 
   - do:
-      ilm.start:
-        policy: "my_lifecycle"
+      ilm.start: {}
   - is_true: 'acknowledged'
 
   - do:
-      ilm.stop:
-        index: logs-foobar
+      ilm.stop: {}
   - is_false: 'dry_run'
 
   - do: