Legacy (non-cloud) events would cause a NPE in the event filter
Although the event woudl still be ignored it would lead to uncessary error logging
This fix addressed this issue using a trace level message instead
(also some improvements in the associated test)
Issue-ID: CPS-1724
Signed-off-by: ToineSiebelink <toine.siebelink@est.tech>
Change-Id: Ibf71b13e4a47aaf705e32df5fe50cf41de5f558f