E2E Test Coverage Part 1

[pglombardo]

Description

In the ramp up to v1, we are putting in thorough E2E tests to cover all parts of the protocol and client.

Besides extended tests, this PR includes the following fixes:

1. Fix DecodeUTF8String to properly handle response strings up to 65535 in length
2. Add DisconnectOptionsBuilder and support all options for MQTT v5 Disconnect
3. More limits checking on things such as Client ID length and other passed in options.

Related Issue

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've written tests (if applicable) for all new methods and classes that I created. (rake test)
• I've added documentation as necessary so users can easily use and understand this feature/fix.