* Migrates all tests to the JUnit 5 Jupiter API
* Updates bnd to 5.1.2
* Updates maven-surefire-plugin to 3.0.0-M5
* Updates Mockito to 3.4.6
* Updates Hamcrest to 2.2
* Removes org.openhab.core.boot POM dependencies
Signed-off-by: Wouter Born <github@maindrain.net>