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/packaging/language/composer.py

@@ -31,6 +31,7 @@ options:
         type: str
         description:
             - Composer arguments like required package, version and so on.
+        default: ''
     executable:
         type: path
         description:

plugins/modules/packaging/language/maven_artifact.py

@@ -51,6 +51,7 @@ options:
         type: str
         description:
             - The maven classifier coordinate
+        default: ''
     extension:
         type: str
         description: