* don't use LemonLoadConf anymore (instead minimal config hash is used in 01 and 02 tests)
* using ENV variables instead of GLOBAL::variable to launch DefaultHander with a test configuration
* unset ENV variables at the end of every test
* adapting Makefile with new dependancies used for test
SpecificHandlers/*.pm)
- adding a comment line to indicate which style is the current specific
handler and how it is supposed to be launched
- adapting DefaultHandler.pm to permit tests passing configuration file parameter
(references #630)