[RHUI 3 ] rhui-manager command fails with 'raise exceptions.ApacheServerException(response_body)' error after packages updated on RHUA

Issue

• rhui-manager command fails with the below error.

  [root@rhua ~]# rhui-manager
  Logging into the RHUI.
  
  It is recommended to change the user's password
  in the User Management section of RHUI Tools.
  
  RHUI Username: admin
  RHUI Password:
  Traceback (most recent call last):
    File "/usr/bin/rhui-manager", line 9, in <module>
      load_entry_point('rhui-tools==3.0.7', 'console_scripts', 'rhui-manager')()
    File "/usr/lib/python2.7/site-packages/rhui/tools/launcher.py", line 313, in main
      pulp_api = _pulp_api(config, prompt, values.username, values.password)
    File "/usr/lib/python2.7/site-packages/rhui/tools/launcher.py", line 128, in _pulp_api
      auth.login(pulp_api, prompt)
    File "/usr/lib/python2.7/site-packages/rhui/tools/auth.py", line 70, in login
      cert_pem = _login(pulp, prompt)
    File "/usr/lib/python2.7/site-packages/rhui/tools/auth.py", line 120, in _login
      response = pulp.login(username, password)
    File "/usr/lib/python2.7/site-packages/rhui/tools/pulp_api.py", line 128, in login
      cert = self.login_api.login(username, password)
    File "/usr/lib/python2.7/site-packages/pulp/bindings/actions.py", line 20, in login
      return self.server.POST(path)
    File "/usr/lib/python2.7/site-packages/pulp/bindings/server.py", line 100, in POST
      log_request_body=log_request_body, ignore_prefix=ignore_prefix)
    File "/usr/lib/python2.7/site-packages/pulp/bindings/server.py", line 166, in _request
      self._handle_exceptions(response_code, response_body)
    File "/usr/lib/python2.7/site-packages/pulp/bindings/server.py", line 202, in _handle_exceptions
      raise exceptions.ApacheServerException(response_body)
  pulp.bindings.exceptions.ApacheServerException
  

• The following errors were observed in /var/log/messages.

  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:CRITICAL: *************************************************************
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:CRITICAL: The Pulp server failed to start due to the following reasons:
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)   The database has not been migrated to the current version. Run pulp-manage-db and restart the application.
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768) Traceback (most recent call last):
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)   File "/usr/lib/python2.7/site-packages/pulp/server/webservices/application.py", line 111, in wsgi_application
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)     _initialize_web_services()
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)   File "/usr/lib/python2.7/site-packages/pulp/server/webservices/application.py", line 74, in _initialize_web_services
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)     migration_models.check_package_versions()
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)   File "/usr/lib/python2.7/site-packages/pulp/server/db/migrate/models.py", line 314, in check_package_versions
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768)     raise Exception(error_message)
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:ERROR: (25549-80768) InitializationException: The database has not been migrated to the current version. Run pulp-manage-db and restart the application.
  Jul  3 17:45:03 rhua pulp: pulp.server.webservices.application:CRITICAL: *************************************************************