Fix non-matching defaults in docs (#5446) (#5451)

* Allow to pass options as lookup options.

* Adjust tests.

* Fix non-matching defaults.

(cherry picked from commit a978bff2c7)

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

plugins/modules/remote_management/manageiq/manageiq_tenant.py

@@ -65,7 +65,7 @@ options:
     - ' - C(vms_allocated) (int): use null to remove the quota.'
     - ' - C(templates_allocated) (int): use null to remove the quota.'
     required: false
-    default: null
+    default: {}
 '''
 
 EXAMPLES = '''