#792 Ticker.testGroup blocking further processing

[Per Olov Jonsson]

It would be beneficial to testing if the Ticker test could be relieved somewhat. As it is now it happens quite often to my testing that not all the tickers finish on time and some of them stay behind lurking. In a normal case this is not so serious (you can kill them with ctrl-c or ctrl-x) but in a virtual machine the unfinished ticker blocks any further processing so that the test never finalises. This is in particular so on weak processors where the VM itself is a load to the Host.

[failure] 20210419 20:37:40.243566
svn: r11306 Change date: 2017-10-07 20:21:20 +0200
Test: TEST_TICKER_THREE_ARGS_TIMESPAN_TRIGGER_MULTIPLE
Class: Ticker.testGroup
File: .../ooRexx/base/class/Ticker.testGroup
Line: 158
Failed: assertTrue
Expected: 1
Actual: 0
Message: should have triggered three times, but triggered 2 times