dyngroups: Also group by distribution and version

Adding dynamic groups for speciffic Linux distributions and versions
thereof so we can apply settings based on those properties.

dyngroups.yml

@@ -2,6 +2,14 @@
   gather_facts: true
   tasks:
   - name: group hosts by distribution
+    group_by:
+      key: '{{ ansible_distribution }}'
+    changed_when: false
+  - name: group hosts by distribution+version
+    group_by:
+      key: '{{ ansible_distribution }}{{ ansible_distribution_major_version }}'
+    changed_when: false
+  - name: group hosts by os family
     group_by:
       key: '{{ ansible_os_family }}'
     changed_when: false