Using hostname for entity_id instead of haproxy_public_url (#8)

Co-authored-by: Philippe Caseiro <pcaseiro@cadoles.com>
Reviewed-on: #8
Co-authored-by: pcaseiro <pcaseiro@cadoles.com>
Co-committed-by: pcaseiro <pcaseiro@cadoles.com>

tasks/hydra-saml.yml

@@ -59,4 +59,4 @@
       mode: u=rw,g=r,o=r
   notify:
     - Restart cadoles-pod-shibboleth-sp-v3
-  become: true
+  become: true