CDS sync fails with error "sslv3 alert certificate expired" due to expired qpid CA certificates on RHUI

Issue

• Running rhui-manager fails with the following error message:

# rhui-manager status
Traceback (most recent call last):
  File "/usr/bin/rhui-manager", line 16, in <module>
    rhui.tools.launcher.main()
  File "/usr/lib/python2.6/site-packages/rhui/tools/launcher.py", line 341, in main
    cli.run(args)
  File "/usr/lib/python2.6/site-packages/rhui/common/cli.py", line 276, in run
    command_or_section.execute(remaining_args)
  File "/usr/lib/python2.6/site-packages/rhui/common/cli.py", line 117, in execute
    self.method(**arg_dict)
  File "/usr/lib/python2.6/site-packages/rhui/tools/commands/status.py", line 51, in show
    ret_code = self._status(kwargs['--code'])
  File "/usr/lib/python2.6/site-packages/rhui/tools/commands/status.py", line 60, in _status
    cds_instances = self.pulp.cds_with_sync_status()
  File "/usr/lib/python2.6/site-packages/rhui/tools/pulp_api.py", line 556, in cds_with_sync_status
    cds_list = self.cds_list()
  File "/usr/lib/python2.6/site-packages/rhui/tools/pulp_api.py", line 547, in cds_list
    raise e
pulp.client.api.server.ServerRequestError: (None, 'sslv3 alert certificate expired', None)

• Red Hat Update Infrastructure uses a qpid message broker for internal communications. These communication processes are secured by SSL, which is set up using the /usr/bin/nss-db-gen script on the RHUA server. Unless configured otherwise, the SSL CA certificate for the qpid message broker will expire after fifteen months: twelve months are the default value used by the nss-db-gen script, plus the default three-month expiration provided by /usr/bin/certutil. Once the certificate has expired, the CDS servers will no longer be able to sync content with the RHUA server.

• CDS sync fails with error sslv3 alert certificate expired due to expired qpid CA certificates on RHUI 2, How to regenerate qpid certificates?