HTTP Proxy for Openstack Provider

Dear Support,

I am trying to create a Provider inside the ManageIQ Docker towards our Openstack (Canonical - Lithium release) through a Proxy server, but the tcpdump shows that goes directly to the final server and not through Proxy.
HTTP Proxy is defined in /usr/lib/systemd/system/evmserverd.service.
Any ideas ?

BR,
Nikos Serpiotis