FORMUS3IC_LAS3 / embb

The bash script before used to determine the path of itself (this is the path with the test binaries). In the /bin/sh script the current path was used instead and the tests failed. Replaced with /bin/sh compatible code, to get the script directory.

- Rename run_tests_linux.sh to run_tests_unix.sh
- Use /bin/sh instead of bash

Michael, Maged M. "Hazard pointers: Safe memory reclamation for lock-free objects." Parallel and Distributed Systems, IEEE Transactions on 15.6 (2004): 491-504.

Might fix bug, where the MPMC queue hang (very very spuriously), because tail->GetNext() == tail...