investigate result of GTEST_SHUFFLE
Fix failing tests using seeds generated in the run: https://jenkins.isc.org/job/kea-dev/job/ut-basic/52
- seed on fedora: 92727
- seed on debian: 24338
- seed on ubuntu: 11764
- seed on centos: 91424
to run tests with those seeds it's needed to have env variables
GTEST_SHUFFLE_SEED with SEED replaced by int.
This exercise is aimed to check if fixing those tests will resolve in fixing kea core code or just tests, if it will be just test code we will not enable GTEST_SHUFFLE in buildfarm.