test/0020-basic.bats also fails sometimes

[MatejKafka]

While researching #76, I also noticed that the "correct printing of synchronization messages" test in test/0020-basic.bats sometimes fails for me, because the setup of the scheduled process takes a long time thanks to the coverage tests.

Unlike in #76, this cannot be solved by increasing the length of a window without increasing the length of the test. My preferred solution would probably be to add an initialization window.

Output log:

>>> 15:51:09.869 [info] Power management disabled (to enable, select a power policy using the -p parameter)
>>> 15:51:09.870 [info] Parsed 1 partition and 3 windows
>>> 15:51:09.870 [info] No processes need initialization
>>> 15:51:09.870 [info] Starting scheduler
<MF>
<WINDOW>
>>> 15:51:09.970 [warning] Window ended before all SC partitions finished
<WINDOW>
>>> 15:51:09.980 [warning] Window ended before all SC partitions finished
<WINDOW>
>>> 15:51:09.990 [warning] Window ended before all SC partitions finished
<MF>
<WINDOW>
>>> 15:51:10.090 [warning] Window ended before all SC partitions finished
<WINDOW>
>>> 15:51:10.100 [warning] Window ended before all SC partitions finished
<WINDOW>
>>> 15:51:10.110 [warning] Window ended before all SC partitions finished
<MF>
<WINDOW>
[DEMOS] Process does not have an initialization window
[DEMOS] Process library set up
1
[DEMOS] Notifying scheduler of completion and suspending process...
<WINDOW>
[DEMOS] Process resumed
2
[DEMOS] Notifying scheduler of completion and suspending process...
<WINDOW>
[DEMOS] Process resumed
3
[DEMOS] Notifying scheduler of completion and suspending process...
<MF>
<WINDOW>
[DEMOS] Process resumed
>>> 15:51:10.266 [info] All processes exited, stopping scheduler