Replace deprecated "include" directive in Ansible 2.4

tasks/main.yml

@@ -12,10 +12,10 @@
       path: '/etc/init.d/zabbix-agent'
     register: zabbix_available
 
-  - include: install.yml
+  - include_tasks: install.yml
     when: not zabbix_available.stat.exists
 
-  - include: config.yml
+  - include_tasks: config.yml
 
   - name: 'Remember that this role had been run'
     set_fact: role_zabbix_agent_completed=true