STANBOL-488: all methods, utilities and variables dealing with request scoped EnhancementProperties now use request properties in their name. This allows a better distinguish between properties as parsed with request (using the '[{engine-name}:]{key}' encoding for keys) and EnhancementProperties as extracted for the current engine. This introduces no functional changes

git-svn-id: https://svn.apache.org/repos/asf/stanbol/branches/release-0.12@1594490 13f79535-47bb-0310-9956-ffa450edef68