fix(_mapdata): ensure map data is directly under `values`

* Semi-automated using https://github.com/myii/ssf-formula/pull/287

firewalld/_mapdata/init.sls

 {%- from tplroot ~ "/map.jinja" import firewalld with context %}
 
 {%- set _mapdata = {
-      "values": {
-        "firewalld": firewalld,
-      }
+      "values": firewalld,
     } %}
 {%- do salt["log.debug"]("### MAP.JINJA DUMP ###\n" ~ _mapdata | yaml(False)) %}