[dev] Migrate to mhus-lib 3.6.3 - extract vaadin libs

 The main change in mhus-lib will be the extraction of mhu-lib-vaadin into a separate project mhus-vaadin.


In this project I started a library for vaadin 14+ but for preparation I moved the subproject of vaadin 8 to this project together. Also the vaadin bridge from mhus-osgi-tools is now located in the new repository.

The new project pass on the

The package declaration was not changed

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