[SUREFIRE-1108] Surefire should print parallel tests in progress been stopped after elapsed timeout

An improvement for SUREFIRE-1108
Hi Andreas,
I have added a text for deprecation. Can i continue to push to ASF?
Since SUREFIRE 2.18 this class is deprecated.
Please use {@link org.apache.maven.surefire.junitcore.pc.ParallelComputerBuilder} instead.