Move common schemas for 0.9 to "stabilizing"

Starting the process of moving schemas to the "stabilizing" status.  This first PR will contain the ones from "common" that are needed for 0.9.

schemas/common/address.schema.json

@@ -105,5 +105,5 @@
       "$ref": "#/definitions/address"
     }
   ],
-  "meta:status": "experimental"
+  "meta:status": "stabilizing"
 }