Proposal for minor change in execution of JUnit tests

[Martin Desruisseaux]

Hello all

By default, Maven executes JUnit tests in every classes ending by 
"Test". I would like to configure Maven for executing the "TestSuite" 
instead. The intend is to ensure that all tests are executed in a 
specific order. While JUnit tests are supposed to be isolated, in 
practice when executed in random order, test failures get lost in a 
forest of other failures caused by the original one. This was a minor 
issue for sis-metadata, but will become more important for 
sis-referencing since it involves chains of operations where each step 
relies on the correct working of other steps.

I tested on the JDK7 branch and it seems to work okay. Is there any 
issue or discussion?

    Martin