Don't try and bind to 127.0.0.1 twice
Merge pull request #133 from Metaswitch/local_bind_bugfix

[Reviewer: Alex] Don't try and bind to 127.0.0.1 twice
Take latest master branch to fix broken UTs

Merge remote-tracking branch 'origin/master' into sto809
Move threadpool.h to cpp-common
Controller thread pool implementation - header only implementation
Move controller thread pool to its own cpp file
Fix some compiler errors
Refactor diameter stack to match HTTP stack