Note that in your case: HTTP_PROXY_HOST and HTTPS_PROXY_HOST HTTP_PROXY_PORT and HTTPS_PROXY_PORT might respectively be the same.
Edit the Tracker launcher shell: /opt/tracker/tracker_proxy.sh with the following content. Please replace the following as appropriate: $HTTP_PROXY_HOST $HTTP_PROXY_PORT $HTTPS_PROXY_HOST $HTTPS_PROXY_PORT