Timerfix

[ChrisJefferson]

This is two tweaks needed for the timer code to pass in cygwin.

1. Cygwin will sometimes report timers after they are cancelled. When we set the signal handler to default, this caused GAP to exit. Change to ignore instead.

2. Extend test timeouts

[olexandr-konovalov]

@ChrisJefferson, I've just pushed extended timeouts too. Happy with yours overwriting mine.

[olexandr-konovalov]

@ChrisJefferson This is perhaps just the same issue that you observe: happened on a Cygwin-free machine testing the nightly build for Windows:

########> Diff in /cygdrive/C/Users/jenkins/workspace/GAP-dev-windows-test/GAP\
-git-snapshot/tst/testinstall/timeout.tst, line 22:
# Input is:
CallWithTimeoutList(5000,spinFor,[10000,1]);
# Expected output:
fail
# But found:
[ 1 ]
########

[olexandr-konovalov]

@ChrisJefferson: I hit again this tonight:

########> Diff in /cygdrive/C/Users/jenkins/workspace/GAP-dev-windows-test/GAP\
-git-snapshot/tst/testinstall/timeout.tst, line 22:
# Input is:
CallWithTimeoutList(5000,spinFor,[10000,1]);
# Expected output:
fail
# But found:
[ 1 ]
######## 

Shall we merge this PR and see if it helps?

[ChrisJefferson]

Yes, let's do that. I've also extended the timeouts, which also should help in cygwin (just wait for the tests to cycle, as a sanity check)