upgrade spring framework to 5.2.20 (#1243)
upgrade spring framework to 5.2.20 (#1243)

Signed-off-by: Bogdan Bondar <2ecb6e90714a7bed706e5861ae196b21c1d5ffd5@bosch.io>
eclipse/hawkbit,eclipse/hawkbit,eclipse/hawkbit,eclipse/hawkbit