Changing cert-find to go through the proxy instead of using the port 8080

The cert-find command now uses the proxy to reach Dogtag, instead of using
the port 8080. In order to accomplish that, it's necessary to change the
proxy configuration including the URL called.

https://pagure.io/freeipa/issue/6966

Reviewed-By: Fraser Tweedale <ftweedal@redhat.com>

ipaserver/plugins/dogtag.py

@@ -1903,7 +1903,7 @@ class ra(rabase.rabase, RestClient):
         self.debug('%s.find(): request: %s', type(self).__name__, payload)
 
         url = 'http://%s/ca/rest/certs/search?size=%d' % (
-            ipautil.format_netloc(self.ca_host, 8080),
+            ipautil.format_netloc(self.ca_host, 80),
             options.get('sizelimit', 0x7fffffff))
 
         opener = urllib.request.build_opener()