[Pharo-dev] more robust tests

Hi While integrating some changes in P6.0 I got such tests failing. Only failing on mac. Could you check? Stef Regression GT.EventRecorder.Tests.Core.GTEventRecorderTest.testAddCollector3 (from GT-EventRecorder-Tests) Failing for the past 1 build (Since Unstable#7 ) Took 0.96 sec. add description Error Message Assertion failed Stacktrace GTEventRecorderTest(TestAsserter)>>assert: GTEventRecorderTest(TestAsserter)>>deny: GTEventRecorderTest>>assertReceiverSemaphore GTEventRecorderTest>>waitForDelivery GTEventRecorderTest>>testAddCollector3 GTEventRecorderTest(TestCase)>>performTest Stef