Fix metadata for Galaxy

Change-Id: I58bf44e13c1880de5ff9bb1273ee0def58772381
diff --git a/meta/main.yml b/meta/main.yml
index 92d0904..8429e81 100644
--- a/meta/main.yml
+++ b/meta/main.yml
@@ -6,6 +6,8 @@
 
 galaxy_info:
   role_name: mariadb
+  namespace: onf
+
   author: Open Networking Foundation
   description: MariaDB Database
   company: Open Networking Foundation
@@ -17,10 +19,12 @@
   min_ansible_version: 2.9.5
 
   platforms:
-    - name: Ubuntu
+    - name: ubuntu
       versions:
-        - "16.04"
-        - "18.04"
+        - bionic
+    - name: Debian
+      versions:
+        - bullseye
 
   galaxy_tags:
     - mariadb