WIP on dispatcher refactor.
Remove some deprecated features.
Fire alarm! Time to commit...
Fix TcpConnection specs
Merge branch 'master' into dispatchers
Minor spec cleaup
Fix some warnings.
Move some common methods into Notification base class
Generalise PayloadDataSizeValidator to reduce duplication.
Generalise RegistrationIdsCountValidator to reduce duplication.
No need for a custom validator here.
Don't duplicate HTTP_STATUS_CODES
Add specs for Http and Tcp dispatchers.
Merge branch 'dispatchers'