Fix reconnect issue

[surajkumar]

When we run the bot and there's a disconnct, we have a retry in place to attempt a "resume" with discord.
The way this works is by using an exponential backoff i.e. try again after 2 seconds, then 4, then 8 etc.

Reconnecting in 4000ms [attempt=1]
Reconnecting in 8000ms [attempt=2]
...

This use to work but with all the refactoring, something broke somewhere.

Repro steps:

1. Start the bot
2. Disconnect your internet
3. Reconnect your internet

The following will start spamming in the console:

14:49:06.702 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketRetryHandler - Reconnecting in 8000ms [attempt=2]
14:49:14.919 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketManager - Connected to Discord
14:49:18.738 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketRetryHandler - Reconnecting in 2000ms [attempt=0]
14:49:18.739 [vert.x-eventloop-thread-0] ERROR com.javadiscord.jdi.internal.gateway.WebSocketHandler - [1000] null
14:49:18.824 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketManager - Connected to Discord
14:49:20.935 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketManager - Connected to Discord
14:49:22.159 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketRetryHandler - Reconnecting in 2000ms [attempt=0]
14:49:22.159 [vert.x-eventloop-thread-0] ERROR com.javadiscord.jdi.internal.gateway.WebSocketHandler - [1000] null
14:49:22.241 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketManager - Connected to Discord
14:49:24.345 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketManager - Connected to Discord
14:49:24.665 [vert.x-eventloop-thread-0] INFO  com.javadiscord.jdi.internal.gateway.WebSocketRetryHandler - Reconnecting in 2000ms [attempt=0]
14:49:24.665 [vert.x-eventloop-thread-0] ERROR com.javadiscord.jdi.internal.gateway.WebSocketHandler - [1000] null

Observations
We're reconnecting and resuming our session with discord correctly.
The error string [1000] null comes from WebSocketHandler#frameHandler

Relevant classes that this error is around:

com.javadiscord.jdi.internal.gateway.WebSocketRetryHandler

com.javadiscord.jdi.internal.gateway.WebSocketManager

com.javadiscord.jdi.internal.gateway.WebSocketHandler

Acceptance Criteria

WHEN connected to discord
AND the internet disconnects
THEN we should successfully be connected to discord without any errors showing up