docker build fails on yum update

[lmsurpre]

Describe the bug
This worked for me yesterday, but now I'm getting:

Step 4/19 : RUN yum update -y &&     yum clean all -y
 ---> Running in dd41b1ce3e2c
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
Red Hat Universal Base Image 8 (RPMs) - BaseOS  1.3 MB/s | 762 kB     00:00    
Red Hat Universal Base Image 8 (RPMs) - AppStre 3.9 MB/s | 3.7 MB     00:00    
Red Hat Universal Base Image 8 (RPMs) - CodeRea  31 kB/s | 9.1 kB     00:00    
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)
Error: 
 Problem 1: cannot install the best update candidate for package python3-rpm-4.14.2-26.el8_1.x86_64
  - nothing provides libzstd.so.1()(64bit) needed by python3-rpm-4.14.2-37.el8.x86_64
 Problem 2: cannot install the best update candidate for package rpm-4.14.2-26.el8_1.x86_64
...

To Reproduce
Steps to reproduce the behavior:

1. mvn clean install -f fhir-parent
2. docker build fhir-install

Expected behavior
The docker build succeeds

Additional context
It started very recently

[prb112]

I think Lee addressed in PR1000 (and Albert reviewed) moving to Review/QA