azure-cli: All az openshift commands fail with a python traceback with 2.0.66

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Describe the bug

All az openshift commands fail with a python traceback. This appeared to start with 2.0.66 and I’ve observed it on both Fedora 30 and RHEL 7.6. In both cases az cli was installed from the Microsoft Azure yum repo. Other az sub-commands do not appear to be affected. Command Name az openshift -h commands such as az openshift scale are also affected and the traceback is similar.

Errors:

The operation 'azure.cli.command_modules.acs.custom#openshift_scale' is invalid.
Traceback (most recent call last):
python2.7/site-packages/knack/cli.py, ln 206, in invoke
    cmd_result = self.invocation.execute(args)
cli/core/commands/__init__.py, ln 507, in execute
    parsed_args = self.parser.parse_args(args)
python2.7/site-packages/knack/parser.py, ln 259, in parse_args
    return super(CLICommandParser, self).parse_args(args)
usr/lib64/python2.7/argparse.py, ln 1705, in parse_args
    args, argv = self.parse_known_args(args, namespace)
...
azure/cli/core/__init__.py, ln 470, in default_description_loader
    op = handler or self.get_op_handler(operation, operation_group=kwargs.get('operation_group'))
azure/cli/core/__init__.py, ln 511, in get_op_handler
    raise ValueError("The operation '{}' is invalid.".format(operation))
ValueError: The operation 'azure.cli.command_modules.acs.custom#openshift_scale' is invalid.

To Reproduce:

Install latest az-cli on Fedora 30 or RHEL 7.6. I have not confirmed if other Red Hat/Fedora releases are affected but I can test those if needed.

run: (or any other az openshift command)

• az openshift -h

Expected Behavior

no traceback, help information is displayed in the case of az openshift -h

Environment Summary

Linux-5.1.8-300.fc30.x86_64-x86_64-with-fedora-30-Thirty
Python 2.7.16
Shell: bash

azure-cli 2.0.66

Additional Context