Clarify why we need sleep.

Author: Kami

packs/tests/actions/chains/test_key_triggers.yaml

@@ -69,6 +69,8 @@ chain:
               ST2_AUTH_URL: "{{protocol}}://{{hostname}}:9100"
               ST2_API_URL: "{{protocol}}://{{hostname}}:9101"
               ST2_AUTH_TOKEN: "{{token}}"
+            # Note: We sleep to wait for the actual trigger instance to be written
+            # in the db so the next task retrieves a correct trigger instance
             cmd: "st2 key set a b ; sleep 2"
         on-success: check_key_create_trigger_instance
     -
@@ -116,6 +118,8 @@ chain:
               ST2_AUTH_URL: "{{protocol}}://{{hostname}}:9100"
               ST2_API_URL: "{{protocol}}://{{hostname}}:9101"
               ST2_AUTH_TOKEN: "{{token}}"
+            # Note: We sleep to wait for the actual trigger instance to be written
+            # in the db so the next task retrieves a correct trigger instance
             cmd: "st2 key set a c ; sleep 2"
         on-success: check_key_change_trigger_instance
     -