cache controllerUrl, it never changes and is relatively expensive to get
cache controllerUrl, it never changes and is relatively expensive to get

this made the benchmark to have 5 req/sec less than 2.0 branch

darimpulso/koala-framework,Sogl/koala-framework,Sogl/koala-framework,nsams/koala-framework,fraxachun/koala-framework,nsams/koala-framework,nsams/koala-framework,yacon/koala-framework,darimpulso/koala-framework,kaufmo/koala-framework,Ben-Ho/koala-framework,yacon/koala-framework,kaufmo/koala-framework,koala-framework/koala-framework,yacon/koala-framework,Ben-Ho/koala-framework,koala-framework/koala-framework,kaufmo/koala-framework,fraxachun/koala-framework