Upgrade to clouddocs 1.12.2 plugin

Change-Id: Id5d30b207ca158293294c03e94c5db4c627a5b23
Remove deprecated hp3par_domain option

The hp3par_domain config option was deprecated in the Havana release.
This just removes it from the config reference guide for the Icehouse
release. This patch resolves the documentation change for patch that
removed it from the source code and unit tests, see
https://review.openstack.org/#/c/65114/ for details.

Change-Id: I8187a772974f36c7ebd5f5674c5c9e0bc1c3376b
Merge "Upgrade to clouddocs 1.12.2 plugin"
Merge "Remove deprecated hp3par_domain option"