Add dnf support

This patch adds dnf support for CentOS.

Implements: blueprint centos-and-dnf
Change-Id: Ice2477c5c44ef1e4cd87763032dda931a87ab195

tasks/designate_install.yml

@@ -107,7 +107,7 @@
     path:  "{{ designate_bin | dirname }}/bin/python2.7"
     state: "absent"
   when:
-    - ansible_pkg_mgr == 'yum'
+    - ansible_pkg_mgr in ['yum', 'dnf']
     - not designate_developer_mode | bool
     - designate_get_venv | changed
 

tests/templates/named.conf.j2

@@ -4,7 +4,7 @@
 options {
         {% if ansible_pkg_mgr == 'apt' %}
         directory "/var/cache/bind";
-        {% elif ansible_pkg_mgr == 'yum' %}
+        {% elif ansible_pkg_mgr in ['yum', 'dnf'] %}
         directory "/var/named";
         {% elif ansible_pkg_mgr == 'zypper' %}
         directory "/var/lib/named";
@@ -41,7 +41,7 @@ options {
         recursion no;
 };
 
-{% if ansible_pkg_mgr == 'yum' %}
+{% if ansible_pkg_mgr in ['yum', 'dnf'] %}
 logging {
         channel default_debug {
                 file "data/named.run";

tests/test-install-designate.yml

@@ -41,7 +41,7 @@
         owner: 'root'
         group: 'named'
       when:
-        - ansible_pkg_mgr == 'yum'
+        - ansible_pkg_mgr in ['yum', 'dnf']
     - name: Restart bind9
       service:
         name: "{{ bind_service_name }}"