Add linters and rules. Fix linter warnings

Author: vitkhab

.ansible-lint

@@ -0,0 +1,3 @@
+---
+exclude_paths:
+  - ./.imported_roles/

.flake8

@@ -0,0 +1,3 @@
+[flake8]
+max-line-length = 80
+exclude = .imported_roles

molecule/resources/yamllint.conf .yamllint

@@ -1,3 +1,4 @@
+---
 extends: default
 
 ignore: |
@@ -12,4 +13,4 @@ rules:
     indent-sequences: true
     level: warning
   braces:
-   max-spaces-inside: 1
+    max-spaces-inside: 1

environments/example/inventory.yml

@@ -1,3 +1,4 @@
+---
 all:
   hosts:
     linux_01:

molecule/default/molecule.yml

@@ -9,7 +9,10 @@ driver:
   name: docker
 
 lint: |
-    yamllint -c molecule/resources/yamllint.conf .
+  set -e
+  yamllint .
+  flake8
+  ansible-lint
 
 platforms:
   - name: common

molecule/default/playbook.yml

@@ -1,5 +1,5 @@
 ---
 - import_playbook: ../../site.yml
   vars:
-    inventory_dir: "{{playbook_dir}}/../molecule/resources/"
+    inventory_dir: "{{ playbook_dir }}/../molecule/resources/"
     zabbix_url: "http://localhost:8080/zabbix/"

molecule/parallels/playbook.yml

@@ -1,4 +1,4 @@
 ---
 - import_playbook: ../../site.yml
   vars:
-    inventory_dir: "{{playbook_dir}}/../molecule/resources/"
+    inventory_dir: "{{ playbook_dir }}/../molecule/resources/"

playbooks/zabbix.yml

@@ -7,7 +7,7 @@
     - { role: dj-wasabi.zabbix-server }
     - { role: dj-wasabi.zabbix-web }
   vars_files:
-    - "{{inventory_dir}}/play_vars/zabbix-server.yml"
+    - "{{ inventory_dir }}/play_vars/zabbix-server.yml"
 
 - name: Configure zabbix agent
   hosts: all
@@ -22,4 +22,4 @@
     - { role: dj-wasabi.zabbix-agent, become: false, tags: ['api'] }
   serial: 1
   vars_files:
-    - "{{inventory_dir}}/play_vars/zabbix-api.yml"
+    - "{{ inventory_dir }}/play_vars/zabbix-api.yml"