Issues with masks and cpuset

[diehlpk]

Using the latest version of stellargroup/hpx:dev on circle-ci yields

docker run -v $PWD:/hpx  -w /hpx/build  ${IMAGE_NAME} ../tools/run_tests.sh

Running Quasistatic test
terminate called after throwing an instance of 'hpx::detail::exception_with_info<hpx::exception>'
  what():  failed to set thread affinity mask (0xfffe) for cpuset 0x00ff00fe: HPX(kernel_error)
../tools/run_tests.sh: line 8:     7 Aborted                 (core dumped) ../../build/src/test/Quasistatic/Test1D -i input_elas_1D_x_+.yaml -k pd -t 1 > Elastic_1D_x+.dat
Test for 1D x+ failed

docker run -v $PWD:/hpx  -w /hpx/build  ${IMAGE_NAME} ../tools/run_tests.sh returned exit code 1

With the latest version of master on my local machine all tests are running

[hkaiser]

This looks like some oddity in the platform the tests are running on.

[hkaiser]

@diehlpk what OS is used to run those tests?