Create docs test target
Create docs test target

Consolidate the docs job to have:
* non-voting checklinks
* single docs job that includes all the voting jobs (checkbuild)
* (keep) publish docs job to publish documents as post job
* marked all other check* jobs as true, they can be removed later.

Note that checkbuild and the gate-trove-docs jobs are separate since the
project has both XML and sphinx docs that have different ways of
publishing.

Change-Id: I3432ddaee4c79fbe395a5c76f2b192cfc2f01e24

mmasaki/trove,zhujzhuo/openstack-trove,openstack/trove,fabian4/trove,cp16net/trove,fabian4/trove,redhat-openstack/trove,hplustree/trove,zhangg/trove,mmasaki/trove,redhat-openstack/trove,fabian4/trove,hplustree/trove,zhujzhuo/openstack-trove,redhat-openstack/trove,openstack/trove,cp16net/trove,cp16net/trove,zhangg/trove,mmasaki/trove,zhujzhuo/openstack-trove