[1738601] cnv-tests automatic scripts from Makefile fail to install HCO

Description of problem:

cloned cnv-tests repos and run
UPSTREAM=1 make cluster-up cluster-install-hco

The cluster seems to be deployed correctly, but installation of HCO fail.

Version-Release number of selected component (if applicable):
cloned from master

How reproducible:

Easy to reproduce, failed twice

Steps to Reproduce:
1. clone cnv-tests
2. UPSTREAM=1 make cluster-up cluster-install-hco
3.

Actual results:

+ sed -i s#https://127.0.0.1:8443#http://127.0.0.1:8080# kubevirtci/_ci-configs/os-3.11.0/.kubeconfig
+ kubevirtci/cluster-up/kubectl.sh create ns kubevirt-hyperconverged
The connection to the server 127.0.0.1:8080 was refused - did you specify the right host or port?
make: *** [Makefile:59: cluster-install-hco] Error 1

Expected results:
cluster-install-hco installs without failures

Additional info:
The scripts was recently changed to use os-3.11 provider instead of k8s
Seems there's no proxy launched to listen port 8080
Tried to launch a proxy with kubectl.sh command, but any connection fails with

I0807 16:56:38.404996 18104 logs.go:49] http: Accept error: accept tcp 127.0.0.1:8080: accept4: too many open files; retrying in 5ms
I0807 16:56:38.405382 18104 logs.go:49] http: proxy error: dial tcp 127.0.0.1:8080: socket: too many open files