[Camel Events Plugin] Make plugin 14.6 compatible

Reported as:

We have the current configuration:
camel 2.25.4
camel-spring 2.25.4
org.onehippo.forge.camel-hippoevt:camel-hippoevt 2.0.2

With this configuration we are encountering exception when application starts:
java.lang.NoSuchMethodError: org.springframework.beans.factory.support.DefaultListableBeanFactory.setApplicationStartup(Lorg/springframework/core/metrics/ApplicationStartup
Why? because camel-spring is bringing wrong dependencies.

If we try to update camel-spring to version 3.7.3 we are going to have another issues because it expects another version of camel.

If we update also the camel cu version 3.7.3 then bloomreach cms is going to throw exception with class not found. It expects a class from camel 2.25.4.
java.lang.NoClassDefFoundError: org/apache/camel/impl/DefaultComponent

Addition (if possible) improve logging:
" java.lang.NoClassDefFoundError: org/apache/camel/impl/DefaultComponent error is not visible into the logs."