Cleanup Wikibase Permissions / Rights

This change removes lots of previous wikibase
rights and instead only makes use of the following:
 - item-term
 - property-term
 - property-create
 - item-merge

All tests have also been updated and rights / perm
checking code has been changed.
i18n for the messages has also been updated / removed
Example and default configs have also been changed

DEPLOYMENT NOTE: OAUTH permissions rights need to
be updated removing previous rights and instead including
item-term, property-term and item-merge

Change-Id: Ibec11b15d1d580a0c055894a2d798a9ccd91ffc4
Merge "Cleanup Wikibase Permissions / Rights"