Failing process tests on Mac OS X

[Sanrag]

The following tests fail when on Mac OS X

testPopulationSizeOfUnexistedProcess(org.arbeitspferde.groningen.subject.open.ProcessManipulatorTest)
testPopulationSizeOfThisProcess(org.arbeitspferde.groningen.subject.open.ProcessManipulatorTest)
testRunningProcess(org.arbeitspferde.groningen.utility.ProcessTest)

Had a chat with @d2rk about this. It's happening due to underlying code depending on /proc file system, which is available only on Linux.

This is a tracking issue for the fix.

[d2rk]

The org.arbeitspferde.groningen.utility.Process class has to be improved to support Windows and Mac OS X. On this moment the implementation only supports Linux.