Fix non-matching defaults. (#5452) (#5453)

(cherry picked from commit f84a9bf932)

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

plugins/modules/cloud/rackspace/rax_scaling_group.py

@@ -37,6 +37,7 @@ options:
       - manual
   files:
     type: dict
+    default: {}
     description:
       - 'Files to insert into the instance. Hash of C(remotepath: localpath)'
   flavor:
@@ -66,6 +67,7 @@ options:
     required: true
   meta:
     type: dict
+    default: {}
     description:
       - A hash of metadata to associate with the instance
   min_entities: