Stop using intersphinx

Remove intersphinx from the docs build as it triggers network calls that
occasionally fail, and we don't really use intersphinx (links other
sphinx documents out on the internet)

This also removes the requirement for internet access during docs build.

This causes docs jobs to fail because we error out on warnings.

Change-Id: I71e941e2a639641a662a163c682eb86d51de42fb
Related-Bug: #1368910
Adjust authentication.rst doc to reference "identity_uri"

The "auth_port", "auth_host", and "auth_protocol" variables were
deprecated in favour of a single "identity_uri" variable.

* Adjust authentication.rst doc to reference "identity_uri"

Change-Id: I48de53f21b8d767b276858ed274066015d765f0e
Closes-Bug: #1361613
Fix options and their groups - etc/glance-api.conf

As per the docs at [0] , some of the options should have been moved
around in the etc/glance-api.conf. This patch changes the conf file to:

    1. indicate new default values
    2. change the group of some of the configs in order to adhere to
       new groups as expected by the deployer.
    3. deprecated configs have been removed or replaced with new ones.

[0] http://docs.openstack.org/trunk/config-reference/content/glance-conf-changes-master.html

Fixes bug: 1380689

Change-Id: I5b5ab96b050b502007e6660a7a613e252404d4e8
Merge "Stop using intersphinx"
Merge "Adjust authentication.rst doc to reference "identity_uri""
Merge "Fix options and their groups - etc/glance-api.conf"