Invalid OpenStack identity credentials

Issue

• Authorization required or denied error
• HTTP 401 authorization denied

• Authentication errors when running OpenStack commands. Examples:

  # glance image-create --name=rhel7-temp --is-public=true --disk-format=qcow2 --container-format=bare /usr/share/rhel-guest-image-7/rhel-guest-image-7.qcow2
  Invalid OpenStack Identity credentials.
  
  # glance image-list
  The request made requires authentication. (HTTP 401) (Request-ID: req-367cb163-938d-4d09-a225-21903511c074)
  # 
  
  /var/log/glance/api.log
  2016-03-27 20:43:54.599 16604 WARNING keystonemiddleware.auth_token [-] Authorization failed for token
  2016-03-27 20:43:57.885 16604 INFO eventlet.wsgi.server [-] 192.168.0.1 - - [27/Mar/2016 20:43:57] "POST /v1/images HTTP/1.1" 401 573 3.313200
  
  /var/log/keystone/keystone.log
  2016-03-27 20:43:58.212 5453 WARNING keystone.common.wsgi [-] Authorization failed. The request made requires authentication. from 192.168.0.1