Add a metadata property for CollectionRequirement (#66370)

* Add a metadata property for CollectionRequirement so the _metadata attribute doesn't need to be accessed directly

* changelog

changelogs/fragments/66370-galaxy-add-metadata-property.yaml

@@ -0,0 +1,2 @@
+minor_changes:
+  - CollectionRequirement - Add a metadata property to update and retrieve the _metadata attribute.

lib/ansible/galaxy/collection.py

@@ -93,6 +93,11 @@ class CollectionRequirement:
     def __unicode__(self):
         return u"%s.%s" % (self.namespace, self.name)
 
+    @property
+    def metadata(self):
+        self._get_metadata()
+        return self._metadata
+
     @property
     def latest_version(self):
         try: