Fixes #9: Use major distro version for Nginx repo on RedHat.

files/nginx.repo

@@ -1,5 +0,0 @@
-[nginx]
-name=nginx repo
-baseurl=http://nginx.org/packages/centos/6/$basearch/
-gpgcheck=0
-enabled=1

tasks/main.yml

@@ -10,8 +10,8 @@
 
 # Nginx setup.
 - name: Enable nginx repo (RedHat).
-  copy:
-    src: nginx.repo
+  template:
+    src: nginx.repo.j2
     dest: /etc/yum.repos.d/nginx.repo
     owner: root
     group: root