HTTP download causes ocl-icd-2.2.12-1.el8.x86_64.rpm download to fail with Proxy while building on OpenShift

[Feelas]

Because ocl-icd-2.2.12-1.el8.x86_64.rpm is downloaded through an HTTP channel (here), the building process might fail on OpenShift if the cluster has http and https proxies configured.

BuildConfigs in OpenShift set HTTP_PROXY and HTTPS_PROXY environment values automatically, but not http_proxy.

Build process output suggests that rpm -ivh is using curl under the hood for the download. curl is notorious for using lowercase http_proxy when establishing an HTTP connection (in contrast to HTTPS where both uppercase and lowercase work).

The best way would be to download ocl-icd-2.2.12-1.el8.x86_64.rpm through an HTTPS channel (though it seems like mirror.centos.org doesn't allow HTTPS access).
As a workaround, it seems like adding http_proxy=${HTTP_PROXY} in front of the the command that does the installation of ocl-icd from http://mirror.centos.org would be enough to fix the problem, but there might be a better and cleaner solution.

[andrei-kochin]

@raymondlo84 looks like it's up to you

[eaidova]

docker was updated to use different way and the latest GPU driver, so I believe this issue should be solved by this PR #1875