MessageSender should be stopped when provider is stopped

Description

DispatcherMessageSender' MuxMessageDispatcher should be stopped when no longer in use.
Along this change, we can hide some of the channel handling logic into simple ChannelMessageSender.

Environment

None

Status

Assignee

Ales Justin

Reporter

Ales Justin

Labels

None

Suitable for new contributors

None

Pull Request

None

Feedback Requested

None

Components

Fix versions

Affects versions

4.2.0.Beta1

Priority

Major