Finish moving logic and variables from nginx_tls_vhosts to nginx_vhosts

Everything is TLS now (whether self-signed or not), so it's pointless
to distinguish.

Signed-off-by: Alan Orth <alan.orth@gmail.com>

roles/nginx/tasks/main.yml

@@ -28,8 +28,8 @@
 - name: Create fastcgi cache dir
   file: path=/var/cache/nginx/cached/fastcgi state=directory owner=nginx group=nginx mode=0755
 
-- include: tls_vhosts.yml
-  when: nginx_tls_vhosts is defined
+- include: vhosts.yml
+  when: nginx_vhosts is defined
   tags: nginx
 
 - name: Configure blank nginx vhost