When running './stack.sh' messages are output stating that
the keystone CLI has been deprecated. These calls should be
replaced to ones utilizing the openstack CLI program instead.
Documentation examples were also updated to reflect the new syntax.
Change-Id: Ib20b8940e317d150e5f6febb618e20bd85d13f8b
Closes-Bug: #1441340
The motivation for this conversion is to have DevStack's docs be
generated using a more familair workflow for OpenStack projects, using
Sphinx.
Changing from raw HTML to RST will also make it easier to contribute
more documentation, as well as making edits less of a hassle.
The majority of the work was done by using Pandoc to convert from HTML
to RST, with minor edits to the output to remove errors in Sphinx.
Change-Id: I9636017965aeade37b950ddf5bdb0c22ab9004bd