Backward compatibility with nginx_php variable

tasks/upstream.yml

@@ -1,5 +1,10 @@
 ---
 
+- name: SET_FACT | Backward compatibility with old version of this role
+  set_fact: >
+    nginx_php56: true
+  when: nginx_php is defined and nginx_php
+
 - name: TEMPLATE | Deploy PHP upstream to Nginx
   template: >
     src=etc/nginx/upstream/php.conf.j2