Fix bug for URI creation when Port not given

[interpolarity]

trafficstars

No additional logif when user/pass given but port not given, resulting in extra colon in the URI to elastic and breaking functionality.

Also, since the bitnami stack for ELK has elasticsearch exposed via /elasticsearch on the 80 port, adding port 80 results in /elasticsearch:80 instead of :80/elasticsearch, breaking all of the endpoints. As bitnami is set to port 80 on default, adding this fix also neatly fixes the issue for anyone trying to use default bitnami settings.