Updated openstack/openstack
Project: openstack-dev/devstack  e92eee3e2646ae98b3d9e9005c67663b29e79ca1

Fix typo errors in devstack documentation

This submission fixes typo errors in following files
  1. contributing.rst
  2. exerciserc.rst
  3. faq.rst
  4. local.conf.rst
  5. openrc.rst

Change-Id: I2b2d61673c3c95f60c56978b5a81016603fef252