[PR #5996/24efe9ee backport][stable-6] Normalize bools in tests (#5997)

Normalize bools in tests (#5996)

* Normalize bools in tests.

* Fix typo.

(cherry picked from commit 24efe9ee9a)

Co-authored-by: Felix Fontein <felix@fontein.de>

tests/integration/targets/mssql_script/tasks/main.yml

@@ -169,7 +169,7 @@
     login_host: "{{ mssql_host }}"
     login_port: "{{ mssql_port }}"
     script: SELECT Invalid_Column FROM Does_Not_Exist WITH Invalid Syntax
-  check_mode: yes
+  check_mode: true
   register: check_mode
 - assert:
     that: check_mode.query_results is undefined