[OPENENGSB-2305] Add comment why we should not upgrade to maven-bundle-plugin 2.3.5
[OPENENGSB-2305] Add comment why we should not upgrade to maven-bundle-plugin 2.3.5

Signed-off-by: Andreas Pieber <57efbcbb22ec0bd89955a40df26b44c340d3e38d@gmail.com>

GitHub2020/openengsb-root,openengsb/openengsb-root,GitHub2020/openengsb-root,openengsb/openengsb-root