Make keep alive ping response an event

[gausby]

Dispatch ping response times via the Tortoise.Events pubsub registry.

When applied this will change the way we register processes in the registry. Previously a :connection would be stored under {client_id, type} where type was the message type like :connection. Now we store type and the value will be the client_id. This will allow us to register and unregister multiple client_ids.

Lastly it has been made possible to match every client id on a node by specifying :_ as the client id when registering for an event type.

[coveralls]

Pull Request Test Coverage Report for Build 405

• 8 of 9 (88.89%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.1%) to 86.258%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/tortoise/connection.ex	4	5	80.0%
<!--	Total:	8	9	88.89%	-->

Files with Coverage Reduction	New Missed Lines	%
lib/tortoise/connection/receiver.ex	1	84.38%
lib/tortoise/connection.ex	1	80.47%
<!--	Total:	2		-->

Totals
Change from base Build 397:	-0.1%
Covered Lines:	521
Relevant Lines:	604

---

💛 - Coveralls