On Suse10, the test libtest_base.so:TimerTest_BasicTimeout_Success occassionally fails

[palladia]

error output:

test_timer.cpp(169):
Assert: timerTestStrand.timeoutTime-startTimeUsec >= FIFTY_MILLISECONDS_AS_USEC
(Timeout took shorter than expected)
[Failed] libtest_base.so:TimerTest_BasicTimeout_Success 0.054719

Investigations show that the actual timeout was sometimes 49.* msecs.

Although various platforms provide high-precision timers, there isn't an easy way to implement this on all platforms. See http://stackoverflow.com/questions/361363/how-to-measure-time-in-milliseconds-using-ansi-c.

Our implementation is located in pal/sleep.c. On most platforms, _POSIX_MONOTONIC_CLOCK does not appear to be > 0, so just basic gettimeofday() is used. It's not trivial to just enable clock_gettime, as many older platforms also require linking with -lrt library.

[palladia]

Fixed by #229