Why the retrieval of GPGkey from Red Satellite server fails with a "404" on RHEL Atomic host ?

Issue

• Why the retrieval of GPGkey from Red Satellite server for EPEL or third party repositories fails with a "404" on RHEL Atomic host ?
• Error message while installing Iperf package from EPEL repository hosted on Red Hat Satellite server 6.2

warning: /var/cache/yum/x86_64/7Server/Default_Organization_EPEL7_EPEL7/packages/iperf-2.0.10-1.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY                                   ]  0.0 B/s |    0 B  --:--:-- ETA 
Public key for iperf-2.0.10-1.el7.x86_64.rpm is not installed
iperf-2.0.10-1.el7.x86_64.rpm                                                                                                                                                                                       |  68 kB  00:00:00     
Retrieving key from https:/test.redhat.com/pulp/katello/api/repositories/7/gpg_key_content

GPG key retrieval failed: [Errno 14] HTTPS Error 404 - Not Found