GlobalGradleSettings now supports storing global settings in memory. This is needed for testing to workaround an NPE when tests use global preferences in Nb 8.0
Added StringUtils.toLines.
TestXmlDisplayer now supports displaying stdout and stderr.
Added tests for TestXmlDisplayer to verify if stdout and stderr is correctly parsed.
Adjusted NbGradleTestSuite.
Adjusted tests, so that they are now using the in memory global settings.