Improved renderer clone tests
Improved renderer clone tests

Removed test that asserted the cloned renderer would not reference the same object as the original.

Replaced tests that stringified the renderer function with tests that compare the original with the clone by reference.
stweil/ol3,oterral/ol3,ahocevar/openlayers,stweil/ol3,ahocevar/ol3,bjornharrtell/ol3,adube/ol3,openlayers/openlayers,ahocevar/ol3,ahocevar/openlayers,openlayers/openlayers,stweil/ol3,stweil/openlayers,stweil/ol3,stweil/openlayers,oterral/ol3,adube/ol3,bjornharrtell/ol3,ahocevar/ol3,stweil/openlayers,ahocevar/openlayers,adube/ol3,ahocevar/ol3,oterral/ol3,bjornharrtell/ol3,openlayers/openlayers