boost::thread & co is removed.

Summary:
Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>

Also removed "thread" from the BoostBinaries_Config.

Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>

boost::thread is no longer needed

Merge branch 'T26335-Remove_boost_thread_and_co'

Test Plan: unit tests are ok

Reviewers: gaoh

Reviewed By: gaoh

Differential Revision: https://phabricator.mitk.org/D200