[digester][patch] CallMethodRuleTestCase clean up

[Emmanuel Bourg <e....@cross-systems.fr>]

Hi, i'm proposing a patch to fix some minor issues with the 
CallMethodRuleTestCase test :

- testSettingProperties is too long and performs several independant 
tests, it should be split into different test methods.

- a new Digester is instantiated in many places, the one created in the 
setUp should be used instead.

- commented code should be removed (espacially the code initializing a 
SimpleLog for the Digester).

- unused objects should be removed (for example the result of 
digester.parse is often affected to Object root1, but sometimes root1 is 
never used).

Emmanuel Bourg