[SUREFIRE-1053] small adjustment to suppress the new "defined twice" warning for properties that can not be set via system properties (or user properties) and thus need to be part of argLine (as well).
[SUREFIRE-1108] Surefire should print parallel tests in progress been stopped after elapsed timeout
+ documentation in fork-options-and-parallel-execution.apt.vm
Avoided unwanted line in logs: [ERROR] null