Don't import tasks in iptables reload and use listen

This syntax doesn't work in Ansible 2.8.0.  Futher, we can use
"listen" to collapse the notify to a single item (at the
expense of duplicating the when clause in the handlers).

Change-Id: I05e2d32f4e1e692ac528a7254c6e3be2858ebacf

playbooks/roles/iptables/handlers/main.yaml

@@ -1,11 +1,20 @@
-- name: Reload iptables Debian
-  import_tasks: tasks/reload-debian.yaml
+- name: Reload iptables (Debian)
+  command: '{{ reload_command }}'
   when:
     - not ansible_facts.is_chroot
     - ansible_facts.os_family == 'Debian'
+  listen: "Reload iptables"
 
-- name: Reload iptables RedHat
-  import_tasks: tasks/reload-redhat.yaml
+- name: Reload iptables (RedHat)
+  command: 'systemctl reload iptables'
   when:
     - not ansible_facts.is_chroot
     - ansible_facts.os_family == 'RedHat'
+  listen: "Reload iptables"
+
+- name: Reload ip6tables (Red Hat)
+  command: 'systemctl reload ip6tables'
+  when:
+    - not ansible_facts.is_chroot
+    - ansible_facts.os_family == 'RedHat'
+  listen: "Reload iptables"

playbooks/roles/iptables/tasks/main.yaml

@@ -25,8 +25,7 @@
     mode: 0640
     setype: '{{ setype | default(omit) }}'
   notify:
-    - Reload iptables Debian
-    - Reload iptables RedHat
+    - Reload iptables
 
 - name: Install IPv6 rules files
   template:
@@ -37,8 +36,7 @@
     mode: 0640
     setype: '{{ setype | default(omit) }}'
   notify:
-    - Reload iptables Debian
-    - Reload iptables RedHat
+    - Reload iptables
 
 - name: Include OS specific tasks
   include_tasks: "{{ item }}"

playbooks/roles/iptables/tasks/reload-debian.yaml

@@ -1,2 +0,0 @@
-- name: Reload iptables (Debian)
-  command: '{{ reload_command }}'

playbooks/roles/iptables/tasks/reload-redhat.yaml

@@ -1,5 +0,0 @@
-- name: Reload iptables (Red Hat)
-  command: 'systemctl reload iptables'
-
-- name: Reload ip6tables (Red Hat)
-  command: 'systemctl reload ip6tables'