NIFI-5562 - Removed unnecessary usage of Guava
NIFI-5562 - Updated Guava version to 28.0-jre
NIFI-5562 - Upgraded Guava to 28.0-jre and Curator to 4.2.0
This closes#3577
Signed-off-by: Mike Thomsen <mthomsen@apache.org>
- take into account input requirement for documentation rendering
- Renamed variable registry scope and added comments
- Doc + change in mock framework to check scope + update of components + UI