make logging homogeneous in tests

component and other modules in TCOM are launching Unit tests as well as integration tests with Spring and OSGI.
These 3 testing environment do not share today the same logging implementation mechanisms, although the code is using slf4j, some execution configuration are based on Log4J, some on Logback.
We need to use the same logging implementation mechanism to have a single set of properties file to configure.

We should also consider setting the default debug level to INFO instead of DEBUG cause a full build generated 18MB of logs right now and it is too much.