Merge pull request #2779 from myrevery/fix/v-add-database

[Bug fix] Avoid duplicate database username

bin/v-add-database

@@ -52,6 +52,7 @@ is_type_valid "$DB_SYSTEM" "$type"
 is_object_valid 'user' 'USER' "$user"
 is_object_unsuspended 'user' 'USER' "$user"
 is_object_new 'db' 'DB' "$database"
+is_object_new 'db' 'DBUSER' "$dbuser"
 get_next_dbhost
 is_object_valid "../../../conf/$type" 'HOST' "$host"
 is_object_unsuspended "../../../conf/$type" 'DBHOST' "$host"