FORMUS3IC_LAS3 / embb

containers_cpp: add tests for blocking priority queue + get rid of namespace in blocking container class

(Merge was previously reverted accidentally. Re-applying merge to fix this.)

This reverts commit 554c76f7, reversing
changes made to fc660db0.

   - Do not use lists
   - Remove HelpScan
   - Release memory to memory manager when destructed (before that, memory had to be released by the memory manager in its destructor).
   - Avoid stdlib algorithms

portability: changed all checks for platform specific defines to checks for EMBB_* defines, fixed affinity implementation for FreeBSD

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...