Fix non-matching defaults in docs (#5446)

* Allow to pass options as lookup options.

* Adjust tests.

* Fix non-matching defaults.

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:

plugins/modules/packaging/os/opkg.py

@@ -47,6 +47,7 @@ options:
             - "remove"
             - "checksum"
             - "removal-of-dependent-packages"
+        default: ""
         type: str
     update_cache:
         description:

plugins/modules/packaging/os/pacman.py

@@ -73,7 +73,7 @@ options:
     extra_args:
         description:
             - Additional option to pass to pacman when enforcing C(state).
-        default:
+        default: ''
         type: str
 
     update_cache:
@@ -89,7 +89,7 @@ options:
     update_cache_extra_args:
         description:
             - Additional option to pass to pacman when enforcing C(update_cache).
-        default:
+        default: ''
         type: str
 
     upgrade:
@@ -102,7 +102,7 @@ options:
     upgrade_extra_args:
         description:
             - Additional option to pass to pacman when enforcing C(upgrade).
-        default:
+        default: ''
         type: str
 
     reason:

plugins/modules/packaging/os/redhat_subscription.py

@@ -152,7 +152,6 @@ options:
               When some attribute is not listed in the new list of attributes, the existing
               attribute will be removed from C(syspurpose.json) file. Unknown attributes are ignored.
         type: dict
-        default: {}
         suboptions:
             usage:
                 description: Syspurpose attribute usage

plugins/modules/packaging/os/sorcery.py

@@ -76,6 +76,7 @@ options:
             - especially useful for SCM and rsync grimoires
             - makes sense only in pair with C(update_cache)
         type: int
+        default: 0
 '''