doc: added rolename and namespace to metadata

meta/main.yml

@@ -3,6 +3,8 @@ galaxy_info:
   author: Jörg Sachse
   description: role to install validation server for the SLUBarchiv digital preservation repository
   company: SLUB Dresden
+  role_name: ansible_lza_validators  # if absent directory name hosting role is used instead
+  namespace: SLUBarchiv_digital      # if absent, author is used instead
   # If the issue tracker for your role is not on github, uncomment the next line and provide a value issue_tracker_url: http://example.com/issue/tracker Some suggested licenses: - BSD
   # (default) - MIT - GPLv2 - GPLv3 - Apache - CC-BY
   license: public domain