Refactor HiveMQ-MQTT-Client library to be usable with GraalVM

[ahelmbr]

The current mqtt-client lib is not usable within graalVM native-image,
because of reflection and dependenciy injection via guice and netty.

Second problem is the usage of netty - initializer must be declared within the library.

• talk to @SgtSilvio when MQTT lib is available for this

• make cli graalVM able

• add documentation for graalVM support

[SgtSilvio]

The HiveMQ MQTT Client library does not use guice dependency injection

[ahelmbr]

Open am Issue on
oracle/graal#1572

[sbaier1]

@gitseti just wondering why this was closed? is there a follow up ticket? AFAIK the current status is that the image is working (including jline), just need to test and add SSL support