Fix deprecations (#35)

* Drop Nagios support
* Fix start PHP-FPM on Docker
* Fix deprecations on Ansible 2.7

- with_ -> loop
- fix filters as test
- test version_compare -> version
- set min_version to 2.5

templates/etc/nginx/conf.d/_upstream.conf.j2

@@ -1,5 +1,5 @@
 {%- macro s(key, value, is_bool, min_version) %}
-{% if nginx_version.stdout | version_compare(min_version, 'ge') %}
+{% if nginx_version.stdout is version(min_version, 'ge') %}
 {% if is_bool and value %} {{ key }}{% elif not is_bool %} {{ key }}={{ value }}{% endif %}
 {% endif %}
 {%- endmacro -%}