Add first, experimental version of 'sleep on empty flag'.

3 jobs from master in 61 minutes 2 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #3805
build_cmake

00:57

 
  Test
failed #3806
run_tests

01:00:04

 
  Sanitizer
skipped #3807
run_address_sanitizer
 
Test run_tests
[ 88%] Building CXX object test/CMakeFiles/tests.dir/main.cpp.o
[ 90%] Building CXX object test/CMakeFiles/tests.dir/data_structures_test.cpp.o
[ 92%] Building CXX object test/CMakeFiles/tests.dir/base_tests.cpp.o
[ 94%] Building CXX object test/CMakeFiles/tests.dir/scheduling_tests.cpp.o
[ 96%] Building CXX object test/CMakeFiles/tests.dir/patterns_test.cpp.o
[ 98%] Building CXX object test/CMakeFiles/tests.dir/scheduling_lock_free_tests.cpp.o
[100%] Linking CXX executable ../bin/tests
[100%] Built target tests
ERROR: Job failed: execution took longer than 1h0m0s seconds