Export the KUBECONFIG variable

Each of the "oc" command that is veryfing the resource
is exiting with error code 1, because the KUBECONFIG is not available.

This commit is partially revert code that was proposed in [1].

[1] #189

pkg/bundle/setup/clustersetup.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #CONST
-KUBECONFIG="/opt/kubeconfig"
+export KUBECONFIG="/opt/kubeconfig"
 LOG_PATH="${LOG_PATH:-"/tmp"}"
 LOG_FILE="${LOG_FILE:-"$LOG_PATH/_RANDOM_SUFFIX_.log"}"
 DNSMASQ_CONF="${DNSMASQ_CONF:-"/etc/dnsmasq.d/crc-dnsmasq.conf"}"