Remove unused ENTITIES

Remove all ENTITY declarations that are not used in a file.

Change-Id: I9b53b53754b303b5b001a95b44e57493bb90b222
Enhance openstack.ent with common entities

Collect currently used entities in common/entities/openstack.ent.

Change-Id: I98d6963590cfeb5d4aa0cf5e6854368d57836999
Use common entities file

Instead of declaring entities separately for each file, include the file
common/entities/openstack.ent.

Change-Id: I99f905be679eab34059a30311f11189c17b5498c
Imported Translations from Transifex

Change-Id: I8519968579796320d9d1068032b62c919ab1de25
Publish only for trunk

Publish documents only for trunk.

This patch needs to go in before we branch for stable. Once branched,
the stable/icehouse branch should be changed again to get a
publishdocs section that only contains the following line for publishdocs:
openstack-doc-test --check-build --publish --only-book install-guide --only-book config-reference

Change-Id: Ibb2f7ef3917801f158896308f1d5b5ba350acf5c
Merge "Remove unused ENTITIES"
Merge "Publish only for trunk"
Imported Translations from Transifex

Change-Id: Iec58c250e4789d4b2490a3b2a89c11cf4c3b1c1f
Merge "Enhance openstack.ent with common entities"
Merge "Use common entities file"