Fix redirects for get_url

* fetch_url shouldn't both accept follow_redirects and support follow_redircts via module.params
* Default follow_redirects for open_url should be 'urllib2'
* Add redirect test for get_url

test/integration/roles/test_get_url/tasks/main.yml

@@ -145,3 +145,8 @@
       - 'get_url_result["failed"]'
   when: "{{ not python_has_ssl_context }}"
 # End hacky SNI test section
+
+- name: Test get_url with redirect
+  get_url:
+    url: 'http://httpbin.org/redirect/6'
+    dest: "{{ output_dir }}/redirect.json"