Remove ansible-lint path exclusions

Fixes several rules with test-playbooks and remove path exclusions.

Since we introduced the progressive mode, exclusions are no longer
needed and not haivng them will assure newly added code follows
the same guidelines.

Change-Id: I0a72d34aff8cf23172e26c7f44e0f61571ec74b6

.ansible-lint

@@ -1,5 +1,3 @@
-exclude_paths:
-  - test-playbooks/  # TODO(ssbarnea): remove skip in follow-up
 parseable: true
 quiet: false
 skip_list:

test-playbooks/dhall/test-dhall-diff.yaml

@@ -7,7 +7,7 @@
     - name: Ensure dhall-diff succeeded
       assert:
         that:
-          - render_diff.stdout == ''
+          - render_diff.stdout | length == 0
 
     - name: Introduce a difference
       copy:
@@ -29,4 +29,4 @@
     - name: Ensure dhall-diff failed
       assert:
         that:
-          - render_diff.stdout != ''
+          - render_diff.stdout | length > 0

test-playbooks/multinode/multi-node-known-hosts.yaml

@@ -12,13 +12,13 @@
         host_addresses: >
           {% set hosts = [] -%}
           {% for host, vars in hostvars.items() -%}
-          {% if vars['nodepool']['private_ipv4'] != '' -%}
+          {% if vars['nodepool']['private_ipv4'] | length > 0 -%}
             {% set _ = hosts.append(vars['nodepool']['private_ipv4']) -%}
           {% endif -%}
-          {% if vars['nodepool']['public_ipv4'] != '' -%}
+          {% if vars['nodepool']['public_ipv4'] | length > 0 -%}
             {% set _ = hosts.append(vars['nodepool']['public_ipv4']) -%}
           {% endif -%}
-          {% if vars['nodepool']['public_ipv6'] != '' -%}
+          {% if vars['nodepool']['public_ipv6'] | length > 0 -%}
             {% set _ = hosts.append(vars['nodepool']['public_ipv6']) -%}
           {% endif -%}
           {% endfor -%}

test-playbooks/multinode/persistent-firewall.yaml

@@ -44,7 +44,10 @@
     - name: Restore iptables
       become: yes
       command: "/etc/init.d/boot.local"
-      when: ansible_os_family == "Suse" and iptables_service is not defined and boot_local_file.stat.exists == True
+      when:
+        - ansible_os_family == "Suse"
+        - iptables_service is not defined
+        - boot_local_file.stat.exists
 
     - name: switch and peer nodes should be in the ipv4 firewall
       become: yes